JP6604603B2 - SEARCH DEVICE, SEARCH METHOD, AND PROGRAM - Google Patents

Description

  The present invention relates to a search device, a search method, and a program that provide a summary of search results.

  In a conventional search service using the Internet, when a search server receives a search request including a search query (search conditions such as keywords) from a user's terminal, the search server stores information on a web page that matches the search query. As a search result to the user's terminal.

  The relationship between the search query from the user terminal and the information on the web page selected by the user terminal from the web pages that match the search query is also stored in the search server as a click log.

  In addition, it is proposed that a search log is used to estimate a user's search intention, and a search server notifies the user's terminal of domain information that matches the search intention (for example, Patent Document 1). .

  For example, when a novel titled “ABC” is prevalent, the search server analyzes a click log of a search query of “ABC” and belongs to a domain classified as a genre of “book sales site”. Identify that information on web pages tends to be clicked. Then, when a new “ABC” search query is received from the user's terminal, the search server sends “YAH_BOOKS_XXX” classified into the genre of “bookstore sales site” together with the search result web page to the user's terminal. To display information about the domain.

Japanese Patent No. 5133946

  As described above, by displaying the domain information, there is a possibility that the domain information suitable for the search intention of the user's terminal may be displayed, but the search intention is different for each user. Appropriate information could not be selected.

  The present invention has been made in view of the above points, and an object of the present invention is to display domain information of a genre suitable for a user's search intention together with a search result.

  In one proposal, a storage unit that stores a domain to which a web page on the Internet belongs is stored in association with a genre, a search query from a terminal is received, and a web page related to the received search query is extracted as a search result. An extracting unit; a detecting unit that detects a domain to which each of the extracted web pages belongs; a specifying unit that specifies a genre stored in association with the detected domain; and for each specified genre And a control unit that causes the terminal to display information on the domain stored in association with the genre together with the search result.

  According to one aspect, it is possible to display domain information of a genre suitable for the user's search intention together with the search result.

It is a figure which shows an example of the search system which concerns on 1st Embodiment. It is a figure which shows an example of the hardware constitutions of the search server which concerns on 1st Embodiment. It is a figure which shows an example of a function structure of the search server which concerns on 1st Embodiment. It is a figure which shows an example of the click log DB which concerns on 1st Embodiment. It is a figure which shows an example of site classification DB which concerns on 1st Embodiment. It is a figure which shows an example of search query classification DB which concerns on 1st Embodiment. It is a flowchart (the 1) which shows an example of the operation | movement procedure which concerns on 1st Embodiment. It is a flowchart (the 2) which shows an example of the operation | movement procedure which concerns on 1st Embodiment. It is a figure (the 1) which shows an example of a display of a user's terminal concerning a 1st embodiment. It is FIG. (2) which shows an example of a display of the user's terminal which concerns on 1st Embodiment.

[First Embodiment]
<System configuration>
FIG. 1 is a diagram illustrating an example of a search system 1 according to the first embodiment. The search system 1 includes a search server 10 and terminals (20a, 20b, 20c). The search server 10 and the terminal 20 are connected via the network 2. The network 2 may be composed of a wired part and a wireless part. The terminal 20 is, for example, a smartphone, a tablet terminal, or a PC.

  The search server 10 stores a correspondence relationship between the list of search results and the web page selected by the user terminal 20 for each search query. This stored correspondence is called a click log.

  The search server 10 receives a search query from the user terminal 20. The search server 10 performs a search process for the received search query. Specifically, the search server 10 refers to the click log, and the search server 10 calculates the selection frequency of the web page for the search query. Based on the calculated web page selection frequency, the search server 10 extracts related web pages as search results for the search query.

  The search server 10 detects the domain of the web page extracted as a search result. Here, the domain is a name system for identifying computers and networks on the Internet. The domain information includes information that identifies a computer that publishes a website on the Internet. The domain information is hierarchically configured, and a web page belonging to the same domain includes a character string indicating that it belongs to the same domain in the URL of the home page. For example, “eiga.com”, “book-shop.com”, etc. are examples of domains.

  The search server 10 stores domain information in association with genres. Specifically, the search server 10 stores a computer or network on the Internet specified by domain information and a genre of information provided on the computer or network in association with each other. For example, the search server 10 stores the genre of the domain “shopping.yah.co.jp” as “shopping” and the genre of “cinema.yah.co.jp” as “movie”.

  The search server 10 specifies the genre to which the domain extracted from the search result belongs, and calculates the importance in the search result of the specified genre. The importance is, for example, a genre ratio in a domain to which a web page located in a predetermined range from the top of the search result belongs.

  The search server 10 selects a genre having a predetermined importance or higher as a genre related to the search query. Next, the search server 10 specifies a domain stored in association with the selected genre. For example, when the selected genre is “shopping”, one or more domains associated with “shopping” are extracted.

  The search server 10 instructs the terminal 20 to display the search result, the selected genre, and the domain information associated with the genre.

<Hardware configuration>
FIG. 2 is a diagram illustrating an example of a hardware configuration of the search server 10 according to the first embodiment.

  The search server 10 according to the first embodiment can be realized by the general-purpose computer 30 using an information processing program. In the general-purpose computer 30, a CPU (Central Processing Unit) 31, a ROM (Read Only Memory) 32, a RAM (Random Access Memory) 33, and an input / output interface 35 are interconnected by a bus 34. An input / output module 36, a storage module 37, a communication module 38, and a drive 39 are connected to the input / output interface 35. A removable medium 40 may be connected via the drive 39.

  The CPU 31 executes a series of processing procedures according to a program recorded in a storage module 37 such as a ROM 32 or a hard disk drive. The RAM 33 appropriately stores data of processing steps and processing results executed by the CPU 31. Programs and data used for processing may be acquired from the outside via the communication module 38. The drive 39 drives them when a removable medium 40 including various recording media (such as an optical disk) is inserted. The input / output module 36 includes a user interface for input such as a keyboard, a mouse, and a touch panel screen, and a user interface for output such as a display and a speaker. The communication module 38 performs communication processing including network connection control.

  Each function of the search server 10 described below can be realized by the CPU 31 operating based on a program recorded in the ROM 32 or the storage module 37.

<Functional configuration>
FIG. 3 is a diagram illustrating an example of a functional configuration of the search server 10 according to the first embodiment. The search server 10 includes an information storage unit 100, a communication unit 130, an input / output processing unit 140, and a control unit 150. The control unit 150 includes a search unit 110 and a domain selection unit 120.

  Each function of the search server 10 cooperates as follows. The information storage unit 100 stores a domain to which a website on the Internet belongs in association with each genre. The communication unit 130 receives a search query from the user terminal 20. The search unit 110 extracts a web page related to the received search query as a search result. The domain selection unit 120 first detects a domain to which each web page extracted as a search result belongs. Next, the domain selection unit 120 specifies a genre stored in the information storage unit 100 in association with the detected domain. For each identified genre, the communication unit 130 causes the user's terminal 20 to display the domain information stored in association with the genre, together with the search result.

  The domain selection unit 120 may calculate the importance in the search result of the specified genre, and may select a genre having a predetermined level of importance or higher among the specified genres. In this case, the communication unit 130 instructs the user's terminal 20 to display the selected genre and information on the domain associated with the selected genre together with the search result.

  Each function will be described below.

  The information storage unit 100 includes a click log DB 100A, a site classification DB 100B, a search query classification DB 100C, and a search DB 100D.

  FIG. 4 shows an example of the click log DB 100A according to the first embodiment. The click log DB 100A stores a search query, a selected URL, and a selected date and time in association with each other. Here, the “selected URL” is a URL selected by the user terminal 20 from the search result list provided from the search server 10 to the user terminal 20 in response to reception of the search query.

  FIG. 5 shows an example of the site classification DB 100B according to the first embodiment. The site classification DB 100B stores a genre and a domain in association with each other. For example, “movie”, “job search”, “comedy”, “book sales”, and the like are set as genres. The genre may be called a property. In the domain, information on the domain of the site corresponding to the genre is set. The domain information is, for example, the URL of the top page of the site. For example, the URL of the top page of a site related to a movie is set in the domain field corresponding to the genre “movie”.

  The domain corresponding to the genre may be manually set by the administrator of the search server 10. Alternatively, the search server 10 may automatically specify a genre from words included in the site, and set the URL of the top page of the site in the domain column corresponding to the specified genre.

  For example, the search server 10 identifies the genre of the site including keywords such as “purchase”, “purchase history”, “shopping cart”, “home appliance”, and “miscellaneous goods” as “shopping”, The URL of the top page of such a site is set.

  The site classification DB 100 </ b> B may have a “domain attribute” field. In the “domain attribute”, a title of the domain and a description of the domain may be stored.

  The site classification DB 100B may include a “genre access count ranking” column and a “recommended flag” column. In the “genre-by-genre access number ranking” column, the access number ranking for each domain in each genre is set. In the “recommended flag” field, a flag is set for the domain recommended by the administrator of the search site.

  FIG. 6 shows an example of the search query classification DB 100C according to the first embodiment. The search query classification DB 100C stores the relationship between the search query and the genre selected from the search results. The domain selection unit 120 calculates a value to be set in the search query classification DB 100C using the click log DB 100A and the site classification DB 100B, and instructs the information storage unit 100 to set the calculated value.

  Specifically, a value set in the search query classification DB 100C is obtained by the domain selection unit 120 performing the following processing.

  The domain selection unit 120 uses the click log DB 100A to detect the domain to which the URL selected from the search result list belongs. For example, when the selected URL is “http://www.shopping.yah.co.jp/abc.abc.abc.abc”, the domain “shopping.yah.co.jp” is detected. Next, the domain selection unit 120 specifies the genre of the domain detected using the site classification DB 100B. The domain selection unit 120 performs the same processing on the click log for a predetermined period, aggregates the genres identified from the processing results, and calculates the number of clicks for each genre and the clicked rate for each genre. To do.

  The search DB 100D stores a correspondence relationship between a search query and an identifier that identifies a web page of a list of search results corresponding to the search query. The search DB 100D is generated based on information in the click log DB 100A. In addition, the search DB 100D may store an identifier for identifying a web page, the title of the web page, a URL, a description of the web page, and the like in association with each other.

  The communication unit 130 receives a search query from the user terminal 20 and notifies the search unit 110 of the control unit 150 of the received search query.

  In addition, the communication unit 130 gives an instruction to display a list of search results extracted by the search unit 110, the genre selected by the domain selection unit 120, and information on the domain associated with the selected genre. The user terminal 20 is notified.

  The communication unit 130 acquires information specifying the URL selected from the search result list from the user terminal 20 and notifies the search unit 110 of the information.

  The input / output processing unit 140 displays various information to the administrator of the search server 10. The input / output processing unit 140 also receives various settings for the search server 10 from the administrator. For example, the input / output processing unit 140 receives input of domain information corresponding to the genre from the administrator.

  The control unit 150 controls each function of the search server 10. Moreover, the control part 150 has the search part 110 and the domain selection part 120, and has the following functions, respectively.

  The search unit 110 receives a search query from the user's terminal 20 via the communication unit 130. The search unit 110 performs a search process using the search query as an input, and generates a list of search results. For example, the search unit 110 may acquire search results corresponding to the search query from the search DB 100D and generate a list of search results. The list of search results may include the title, URL, and description of the web page of the web page extracted by the search.

  The search unit 110 notifies the communication unit 130 that the user's terminal 20 is notified of the list of generated search results, the genre notified from the domain selection unit 120, and the domain information associated with the genre. Instruct.

  The search unit 110 acquires information specifying the URL selected by the user terminal 20 from the search result list via the communication unit 130. The search unit 110 instructs the information storage unit 100 to store the acquired information in the click log DB 100A.

  As described above, the domain selection unit 120 uses the click log DB 100A and the site classification DB 100B to identify the correspondence relationship between the search query and the genre, and stores the identified correspondence relationship in the search query classification DB 100C. To the information storage unit 100.

  Further, the domain selection unit 120 acquires the search query received by the search server 10 from the search unit 110. The domain selection unit 120 specifies a genre corresponding to the acquired search query with reference to the search query classification DB 100C.

  The domain selection unit 120 selects a genre having a predetermined degree of importance or more from a plurality of genres corresponding to the search query. Specifically, when the number of accesses for a predetermined period exceeds a predetermined number, or when the access ratio for a predetermined period exceeds a predetermined ratio, the domain selection unit 120 selects as a genre having an importance level equal to or higher than a predetermined level. May be.

  The domain selection unit 120 determines a domain to be notified to the user terminal 20 as a domain corresponding to the genre selected from the site classification DB 100B. For example, the domain selection unit 120 may determine the domains from the first to the Nth place (N is a natural number) in the ranking of the number of accesses by genre as domains associated with the selected genre. Further, the domain selection unit 120 may determine that the domain for which the recommendation flag is set is the domain associated with the selected genre.

  Note that the domain associated with the selected genre may not be included in the domain to which the web page extracted as the search result belongs.

  The domain selection unit 120 notifies the search unit 110 of the selected genre and information on the domain determined as the domain associated with the genre.

  Note that the domain selection unit 120 may notify the search unit 110 of the specified genre and information on the domain corresponding to the specified genre. In this case, the domain selection unit 120 does not perform domain selection processing based on importance.

  Here, in addition to the domain URL, the domain information associated with the genre may include a favicon (favorite icon) that is a symbol mark image of the website and a description of the domain.

<Operation procedure>
(1) Search Query Classification DB Update Procedure FIG. 7 is a flowchart (part 1) illustrating an example of an operation procedure according to the first embodiment.

  The search server 10 updates the information stored in the search query classification DB 100C by executing the operation procedure shown in FIG.

  In step S101, the domain selection unit 120 of the search server 10 refers to the click log DB 100A and acquires the click log accumulated for each search query.

  In step S102, the domain selection unit 120 calculates the number of selections of URLs clicked from the acquired click log in a predetermined period and the cumulative number of display times. Further, the domain selection unit 120 divides the number of selections by the cumulative number of display times and calculates a click rate for each clicked URL. A web page with a high click rate is a web page that is frequently selected by the user's terminal 20.

  In step S103, the domain selection unit 120 extracts a web page with a high click rate. For example, the domain selection unit 120 extracts a web page whose click rate is higher than a predetermined threshold (for example, 3%). Such a predetermined threshold can be set by the administrator of the search server 10.

  If the click rate is greater than or equal to a predetermined threshold, it can be assumed that the search intention of many users is met. On the other hand, if the click rate is less than a predetermined threshold, it cannot be assumed that it matches the intention of many users' search, and there is a possibility that it has been selected by mistake. For this reason, the domain selection unit 120 extracts a web page having a click rate equal to or higher than a predetermined threshold.

  In step S104, the domain selection unit 120 detects each domain of the extracted web page. For example, when the URL of the extracted web page is “http://www.eiga.com/loadshow/featured/ABC...”, The domain selection unit 120 uses eiga. com "is detected as a domain. Note that the domain selection unit 120 may detect a region surrounded by “/” after “http:” using the regularity of the URL as a domain, or detect a domain using a regular expression. May be.

  In step S105, the domain selection unit 120 specifies each genre of the detected domain using the site classification DB 100B. For example, when the detected domain is “eiga.com”, the domain selection unit 120 specifies that the genre associated with the site classification DB 100B is “movie”. When the search server 10 executes the process of specifying the genre in units of domains, the genre that matches the user's search intention can be specified even if the details of the URL of the web page extracted from the click log are different. It becomes possible.

  In step S106, the domain selection unit 120 calculates a genre distribution for each search query. Specifically, the genre to which each of the extracted web pages belongs is specified by the processing from step S101 to step S105. The domain selection unit 120 calculates the number of accesses for each identified genre. For example, among the extracted web pages, the domain selection unit 120 calculates the total number of accesses of web pages whose genre is “movie”, and sets it as the number of accesses of the genre “movie”.

  Further, the domain selection unit 120 calculates the ratio of each identified genre. Specifically, the domain selection unit 120 calculates the ratio of each specified genre by dividing the total value of each specified genre by the number of accesses in a predetermined period.

  Note that the domain selection unit 120 may adjust the distribution by weighting each web page.

  In step S107, the domain selection unit 120 instructs the search query classification DB 100C to update the number of accesses of each genre related to the calculated search query and the ratio of each genre. With this update, the genre distribution corresponding to the search query in the predetermined period is stored in the search query classification DB 100C. Thereby, the search server 10 can grasp | ascertain appropriately the intention of the user's search in a predetermined period.

  For example, even if a novel titled “ABC” is published and then converted into a movie, the search server 10 updates the genre corresponding to the search query every predetermined period, and therefore a large proportion of the genre distribution. It can be understood that the genre occupied changes from “book sales” to “movies”. That is, the search server 10 can specify the intention of the search corresponding to the search query in consideration of current affairs / fashion.

  The timing at which the search server 10 updates the search query classification DB 100C and the click log target period can be set by the administrator of the search server 10.

  The domain selection unit 120 may omit the process of “extracting a web page with a high click rate” in step S103. The domain selection unit 120 may detect a domain to which all the clicked web pages belong and calculate a genre distribution corresponding to the domain.

(2) Notification of Domain Information to User's Terminal 20 FIG. 8 is a flowchart (part 2) illustrating an example of an operation procedure according to the first embodiment.

  By executing the operation procedure shown in FIG. 8, the search server 10 displays on the user terminal 20 the genre associated with the search query and the domain information associated with the genre. Instruct.

  In step S <b> 201, the search unit 110 determines whether a search query has been received from the user terminal 20 via the communication unit 130. If a search query has been received (step S201 YES), the process proceeds to step S202. On the other hand, when the search query is not received (NO in step S201), the process ends.

  In step S <b> 202, the search unit 110 acquires a search query via the communication unit 130. The search query is included in the search request transmitted from the user terminal 20.

  In step S203, the search unit 110 refers to the search DB 100D and executes a search. As a result of the search execution, a list of search results is generated.

  In step S204, the search unit 110 notifies the domain selection unit 120 that the search query has been received from the user terminal 20.

  The domain selection unit 120 refers to the search query classification DB 100C and selects a plurality of genres having a degree of importance equal to or higher than a predetermined level from among the genres corresponding to the search query.

  The “importance” may be a genre ratio corresponding to the search query stored in the search query classification DB 100C. Since this ratio is calculated from the extracted web page of the search unit 110, it may be referred to as “a genre ratio in the extracted web page”.

  The “importance” may be the number of accesses of a genre corresponding to the search query stored in the search query classification DB 100C. Since the number of accesses is calculated from the extracted web page of the search unit 110, it may be referred to as “the number of genre accesses in the extracted web page”.

  For example, a case where the search query is “ABC”, the importance is the genre ratio, and the threshold is 10% will be described as an example. The domain selection unit 120 selects the genres “movie”, “comedy”, and “book sales” from the search query classification DB 100C.

  In step S205, the domain selection unit 120 acquires the URLs of a predetermined number of domains corresponding to the selected genre and the attributes of the domains from the site classification DB 100B. The domain URL and domain attributes may be referred to as domain information. The domain selection unit 120 determines domain information to be selected based on the number of accesses by domain genre and / or presence / absence of a recommendation flag.

  For example, when “movie”, “comedy”, and “book sales” are selected as genres, the domain selection unit 120 sets “eiga.com”, “movies” for “movie” based on the genre access number ranking. .Com ”and“ cinema.co.jp ”domain information,“ commutation ”for“ Matsutake.com ”,“ owarai.co.jp ”, and“ yoshima.co.jp ”domain information And “books.co.jp”, “bunko.co.jp”, and “book-shop.co.jp” may be acquired for “book sales”.

  Here, the domain to which the web page extracted by the search unit 110 belongs and the domain selected by the domain selection unit 120 are independent. The domain selected by the domain selection unit 120 may not be included in the domain to which the extracted web page belongs.

  As a result, even if the domain of the web page is not displayed on the user's terminal 20 as a result of the search query, the domain information that the domain selection unit 120 determines to be a useful domain related to the user's search intention is displayed. It can be provided to the terminal 20.

  The “importance” may not be set. In this case, the domain selection unit 120 selects the identified genre and the domain stored in the site classification DB 100B as the domain corresponding to the identified genre. It will be done.

  In step S206, the domain selection unit 120 notifies the search unit 110 of the selected genre and information on the domain associated with the selected genre. The search unit 110 edits information notified to the user terminal 20. Specifically, the search unit 110 edits the list of search results generated according to the search query, the selected genre, and the information of the selected domain to be displayed on the user terminal 20 as a search result screen. Do.

  In step S <b> 207, the search unit 110 notifies information to be displayed on the user terminal 20 via the communication unit 130.

  In step S <b> 208, the search unit 110 determines whether selection of a search result by the user terminal 20 has been received via the communication unit 130. If selection is accepted (YES in step S208), the process proceeds to step S09. On the other hand, if the selection is not accepted (NO in step S208), the process ends.

  In step S209, the search unit 110 instructs the click log DB 100A to store information such as the URL of the clicked web page and the date and time. In response to the instruction, the click log DB 100A stores the instructed information.

<Display of terminal>
FIG. 9 is a diagram illustrating an example of a display on the user terminal 20 according to the first embodiment.

  The user's terminal 20 receives from the search server 10 an instruction to display the selected genre and domain information associated with the selected genre together with the search result. In response to receiving the instruction, the user terminal 20 displays a search result or the like according to the instruction.

  (1) of FIG. 9 is an example of a display on the user terminal 20. The search result is displayed in the search result display area 50 on the display of the user terminal 20, and information on the domain selected by the domain selection unit 120 is displayed in the display area 60 of the selected genre.

  In (1) of FIG. 9, a tab 62 for each genre is generated in the display area 60 of the selected genre, and domain information corresponding to the genre is displayed on the tab 62 for each genre. For example, information of three domains “Raku XXX”, “YHXXX”, and “AZXXX” is displayed in the genre “Shopping”. Further, in (1) of FIG. 9, “shopping” having the highest importance among the genres corresponding to the search query is displayed.

  (2) of FIG. 9 is a display of the terminal 20 of the user when the “travel” tab 62 is selected. When (Travel) tab 62 is selected when (1) in FIG. 9 is displayed on user terminal 20, user terminal 20 changes to the display in (2) in FIG. Even when a tab 62 of a genre different from the user's search intention is displayed, by changing the tab 62, a domain suitable for the user's search intention can be displayed.

  The domain information may be displayed together with the favicon 61.

  FIG. 10 shows another display example of the user terminal 20. In (1) of FIG. 10, a genre selection button 63 is provided in the display area 60 of the selected genre without using the tab 62, and domain information is displayed for each genre. Even in this display method, it is possible to increase the possibility that information on a domain suitable for the user's search intention is displayed.

  (2) of FIG. 10 is a display of the terminal 20 of the user when the “travel” genre selection button 63 is selected. When (1) in FIG. 10 is displayed on the user terminal 20 and the “travel” genre selection button 63 is selected, the user terminal 20 changes to the display in (2) in FIG. . When the genre of the user's search intention is displayed, by selecting the genre selection button 63, the display area of the domain that matches the user's search intention can be expanded.

<Others>
The search server 10 is an example of a search device. The information storage unit 100 is an example of a storage unit. The search unit 110 is an example of an extraction unit. The domain selection unit 120 is an example of a detection unit, a specification unit, a calculation unit, and a selection unit. The communication unit 130 is an example of a control unit. Each function of the search server 10 may be implemented on different hardware. In this case, the functions of the search server 10 are realized by cooperation of the functions implemented on different hardware. For example, the search server 10 may acquire information from the information storage unit 100 installed in another device and realize the above-described operation.

  A storage medium storing software program codes for realizing the functions of the above-described embodiments may be supplied to the search server 10. Needless to say, the above-described embodiment is also achieved when the search server 10 reads and executes the program code stored in the storage medium. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiment, and the storage medium storing the program code constitutes any of the embodiments. Here, the storage medium is a recording medium or a non-transitory storage medium.

  The functions of the above-described embodiments are not only realized by executing the program code read by the computer device. An operating system (OS) or the like operating on the computer device may perform part or all of the actual processing in accordance with the instruction of the program code. Furthermore, it goes without saying that the functions of the above-described embodiments may be realized by the processing.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to such embodiment, A various deformation | transformation and substitution can be added in the range which does not deviate from the summary of this invention.

DESCRIPTION OF SYMBOLS 1 Search system 2 Network 10 Search server 20 Terminal 100 Information storage part 110 Search part 120 Domain selection part 130 Communication part 140 Input / output processing part 150 Control part

Claims (8)

A storage unit for storing a domain to which a web page on the Internet belongs in association with a genre;
An extraction unit that receives a search query from a terminal and extracts a web page related to the received search query as a search result;
A detection unit for detecting a domain to which each of the extracted web pages belongs;
A specifying unit for specifying a genre stored in association with the detected domain;
A search apparatus comprising: a control unit that displays, for each of the specified genres, domain information stored in association with the genre, together with the search results, on the terminal. A calculation unit that calculates importance of a genre stored in association with the domain in the search result;
A selection unit that selects a genre having an importance level equal to or higher than a predetermined level among the identified genres, and the control unit is stored in association with the genre for each selected genre. The search device according to claim 1, wherein domain information is displayed on the terminal together with the search result.   The search device according to claim 2, wherein the domain stored in association with the selected genre includes a domain to which the web page extracted as the search result does not belong.   The search device according to claim 2, wherein the importance is a ratio of a genre in the extracted web page.   The search device according to claim 2 or 3, wherein the importance is the number of accesses for each genre in the extracted web page.   The selection unit selects each of the domains stored in association with the selected genre based on the number of accesses of each domain and / or presence / absence of a recommendation flag. The search device according to claim 5. A search method executed by a search device,
Storing a domain to which a web page on the Internet belongs in association with a genre;
Receiving a search query from a terminal and extracting a web page associated with the received search query as a search result;
Detecting a domain to which each of the extracted web pages belongs;
Identifying a genre stored in association with the detected domain;
For each identified genre, displaying information on a domain stored in association with the genre on the terminal together with the search result. Storing a domain to which a web page on the Internet belongs in association with a genre;
Receiving a search query from a terminal and extracting a web page associated with the received search query as a search result;
Detecting a domain to which each of the extracted web pages belongs;
Identifying a genre stored in association with the detected domain;
A program that causes a computer to execute, for each identified genre, a step of causing the terminal to display information on a domain stored in association with the genre together with the search result.

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