JPH04290159A - Method and device for proofreading japanese document - Google Patents

Abstract

PURPOSE:To easily substitute a synonym with a synonym of different work kind when the Japanese document contains the synonym ranging over different word kinds. CONSTITUTION:A text storage part 3 is stored with the document so as to display distribution states by the kinds of words in the document. A synonym dictionary part 4 holds many words together with corresponding information for discriminating the word kinds of Chinese words, Japanese words, and borrowed words. A word kind decision part 5 decides which word is of which word kind as to all the words which are classified into at least the Chinese words, Japanese words, and borrowed words. A distribution state calculation part 6 calculates the distribution states by the word kinds. A distribution state display part 7 displays the calculated distribution states.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a proofreading method and apparatus for pointing out and correcting inappropriate expressions and errors in documents.

0002

2. Description of the Related Art When synonyms are used frequently in a Japanese text, the terms may become inconsistent when viewed throughout the text. As a conventional device for proofreading such inconsistencies in terminology within a text, there is a document creation device disclosed in Japanese Patent Application Laid-Open No. 177655/1983. FIG. 7 shows its configuration diagram. In this device, in order to perform a synonym search on a created sentence, a designation of a target word is inputted from the input unit 1. Then, the analysis unit 2 sends the word to be searched for a synonym and a synonym search instruction to the control unit 4. The control unit 4 activates the synonym search unit 5, searches for word candidates that can be synonyms for the search target word from the beginning of the sentence, and points out the locations where all words determined to be synonyms exist. ing. Also,
There is a synonym expression conversion device disclosed in Japanese Patent Application Laid-Open No. 63-316157. FIG. 8 shows its configuration diagram. In this device, in a sentence stored in a sentence storage means 2, a word at a specified location using a designation means 3 is converted into a synonym expression conversion means 4.
It converts into synonym expressions and presents all the converted candidates. These devices can point out all the locations of synonyms included in a sentence for a word specified by the operator, or select one word from among all other synonyms and return it to the original. The terminology was unified throughout the text by replacing it with the word .

0003

[Problem to be Solved by the Invention] As mentioned above, in conventional proofreading devices, for a word specified by the operator, all synonyms included in the sentence are presented, or the specified word is When replacing with synonyms, all candidate synonyms were simply listed and presented. However, depending on the purpose of the text being created, there are demands such as avoiding the use of words of specific types such as foreign words as much as possible. In this case, with conventional devices, in order to determine whether a specific word type is included in a sentence, the operator must judge the word types of all words extracted from the text. Ta. Furthermore, in order to determine whether synonyms of different word types are used in a sentence, the operator has to judge the word types of words extracted from the sentence that are synonymous with each other. Furthermore, it is not possible to limit the extraction of only words of a specific type contained in a sentence. Alternatively, even when replacing words of a specific word type with synonyms of other word types, synonyms of word types that do not need to be presented are also presented, so a large display area is required. In addition, the number of synonym candidates increases, and since a word must be selected from a large number of candidates, the operation becomes complicated and the burden on the operator becomes heavy.

[0004] In view of this point, the present invention provides a method for determining synonyms that span different word types in a Japanese sentence.
Displays the distribution of words in a sentence by word type, also displays synonyms across different word types in a sentence, distinguishing them by word type, and also displays words of a specific word type and synonyms of other word types for that word. It is an object of the present invention to provide a method and apparatus for proofreading Japanese sentences that can easily replace words of a specific word type with synonyms of another word type.

[0005]

[Means for Solving the Problems] A first invention provides a text storage unit for storing sentences, and at least Chinese, Japanese and There is a synonym dictionary that stores a large amount of information that distinguishes word types such as Chinese words and foreign words, and a synonym dictionary that stores a large amount of information that is associated with words to distinguish between words and foreign words. The present invention is characterized by comprising a word type discriminator that determines which word type the word is, a distribution status calculation unit that calculates the distribution status of each word type, and a distribution status display unit that displays the calculated distribution status. Configure a proofreading device for Japanese sentences.

[0006] In the second invention, in order to display synonyms of different word types in a sentence, if there are synonyms of different word types, a text storage unit that stores the sentence and at least Chinese,
There is a synonym dictionary section that stores a large amount of information that distinguishes between Japanese words and foreign words in association with words, a synonym extraction section that extracts all words that have a synonymous relationship with each other from a sentence, and a synonym dictionary section that stores a large amount of information that distinguishes between Japanese words and foreign words. A proofreading device for Japanese sentences characterized by comprising an inconsistency determining unit that determines whether a word of a word type is included, and an inconsistency display unit that displays a corresponding expression if there is an inconsistency. Configure.

[0007] The third invention is to achieve, when a word of a specified word type is present in a sentence and the word has a synonym of another word type, the synonym is presented together with the corresponding word. A text storage unit that stores sentences, a synonym dictionary unit that stores a large amount of information that distinguishes between word types such as Chinese, Japanese, and foreign words in association with words, and a word type specification unit that specifies word types. a word extraction section that extracts words of the same word type from the text; a synonym search section that searches all synonyms of the extracted words; A Japanese sentence characterized by comprising: a determination unit that determines whether or not there is a word, a word display unit that displays a corresponding word in a sentence, and a synonym display unit that displays synonyms of word types other than the specified word type. Configure the calibration device.

[0008] The fourth invention includes a synonym selection section for selecting one of the synonyms displayed in the synonym display section and a word display section in order to replace an expression in a sentence with a selected synonym. A Japanese text proofreading device is provided, comprising an expression replacement unit that replaces a corresponding expression in a displayed sentence with a selected synonym.

[0009]

[Operation] According to the first invention, with the above-described configuration, the word type discriminator determines the word types of words included in a Japanese sentence, and the distribution status calculation unit calculates the word type distribution status based on this. death,
The distribution status display section displays the results.

[0010] In the second invention, with the above-described configuration, the inconsistency determining unit determines whether or not words of different word types are included among words that have a synonymous relationship with each other in the sentences extracted by the synonym extraction unit. However, if there is a discrepancy, the discrepancy display section displays the corresponding part.

[0011] In the third aspect of the present invention, with the above-described configuration, the word extraction section extracts words of the specified word type from the text, and the synonym search section searches for synonyms of the extracted words using the synonym dictionary section. Subsequently, the determination unit determines whether or not there are synonyms of other word types among the searched synonyms, and if so, displays the relevant part and presents the other word type of synonyms.

[0012] According to the fourth aspect of the present invention, when the operator selects one of the presented synonyms according to a request from the synonym selection unit, the expression replacement unit replaces the corresponding expression with the selected synonym. and replace the words in the text with synonyms other than the specified word type.

[0013]

Embodiment FIG. 1 shows a block diagram of a Japanese text proofreading apparatus according to an embodiment of the present invention. In Figure 1,
1 is an input unit for inputting sentences and the device; 2 is a control unit for activating the relevant function according to the input from the input unit 1; 3 is a text storage unit for storing input Japanese sentences; 4 is at least a Chinese or Japanese text; This is a synonym dictionary that stores a large amount of information that distinguishes between words and foreign words in association with words. 5 is a word type discrimination unit that discriminates the word type of words included in a sentence;
6 is a distribution status calculation unit that calculates the distribution status of each word type of words in a sentence based on the results of the word type discrimination unit 5; 7 is a distribution status display unit that displays the distribution status calculated by the distribution status calculation unit; be. In this embodiment, the distribution status is the frequency of words. The word type discrimination section 5 is activated by the control section 2. Reference numeral 8 denotes a synonym extraction unit that extracts all words that have a synonymous relationship with each other contained in a sentence, and 9 a disunity unit that determines whether words of different word types are included in the synonyms extracted by the synonym extraction unit 8. The determination unit 10 is a disunity display unit that displays corresponding synonyms based on the results of the disunity determination unit 9. The synonym extraction unit 8 is activated by the control unit 2. 11 is a word type specification section for specifying the word type of a synonym to be extracted from a sentence; 12
Reference numeral 13 refers to a word extraction unit that extracts all the words of the word type specified by the word type specification unit 11 from the text, 13 refers to a synonym search unit that searches the synonym dictionary unit 4 for synonyms of the word extracted by the word extraction unit 12, and 14 refers to a synonym search unit a determination unit that determines whether the synonyms searched by the synonym search unit 13 include a synonym of a word type different from the word type specified by the word type designation unit 11;
15 is a word display section that displays the words extracted by the word extraction section 14; 16 is a synonym display section that displays synonyms other than the word type specified by the word type specification section 11 from among the synonyms searched by the synonym search section 13; be. 17 is a synonym display section 16
This is a synonym selection unit that selects one of the synonyms displayed in accordance with the operator's instructions, and has a function of accepting input. Reference numeral 18 denotes an expression replacement unit that replaces the word in the sentence displayed by the word display unit 15 with a synonym selected by the synonym selection unit 17. Reference numeral 19 denotes an output section that displays input information from the input section 1, Japanese sentences stored in the text storage section 3, and information on the processing results of each display section.

The operation of the calibration apparatus of this embodiment configured as described above will be explained below.

First, the operation of displaying the distribution status of each word type of words included in a sentence will be explained. (1) The operator inputs an instruction to display the distribution status from the input unit 1 in order to obtain information on the frequency of each type of word contained in the created sentence. (2) In response to the above operation, the control section 2 activates the word type discrimination section 5. (3) The word type discrimination unit 5 uses the synonym dictionary unit 4 to discriminate the word types of all words in the sentences stored in the text storage unit 3, and stores the results in the temporary storage unit X1 (not shown). Store. (4) Next, the word type discrimination unit 5 activates the distribution situation calculation unit 6. (5) The distribution situation calculation unit 6 calculates the frequency of each type of word in the sentence based on the results stored in the temporary storage unit X1, and stores the results in the temporary storage unit X2 (not shown). do. (6) Next, the distribution situation calculation unit 6 activates the distribution situation display unit 7. (7) The distribution status display unit 7 displays the frequency of each type of word in the sentence based on the results stored in the temporary storage device X2 as shown in FIG.
It is displayed on the output section 19 as shown in FIG. (End) Next, when synonyms of different word types are included in a sentence, the operation of displaying these words will be explained. (1) In order to display synonyms of different word types included in the created sentence, the operator inputs this through the input unit 1. (2) In response to the above operation, the control unit 2 activates the synonym extraction unit 8. (3) The synonym extraction unit 8 uses the synonym dictionary unit 4 to extract all words that have a synonymous relationship with each other in the sentences stored in the text storage unit 3, and stores the results in the temporary storage unit Y1.
(not shown). (4) Next, the synonym extraction unit 8 activates the inconsistency determination unit 9. (5) Based on the results stored in the temporary storage unit Y1, the inconsistency determining unit 9 determines whether or not the extracted words that have a synonymous relationship include words of different word types. , and stores the results in a temporary storage device Y2 (not shown). At the same time, if synonyms of different word types are included, the inconsistency display unit 10 is activated. (6) Based on the results stored in the temporary storage section Y2, the disunity display section 10 displays the corresponding disunity expression on the output section 19 as shown in FIG. (End) Next, when there is a word of the word type that the operator wants to remove in the text, the operation of displaying the word of the word type and replacing it with a synonym of another word type will be explained. (1) In order to replace a word of a specific word type with a word of another word type, the operator first inputs an instruction to specify a word type from the input unit 1. (2) In response to the above operation, the control unit 2 activates the word type designation unit 11. (3) The word type designation unit 11 stores the word type input from the input unit 1 in the temporary storage unit Z1 (not shown). (4) Next, the operator inputs an instruction to perform word extraction from the input unit 1 in order to extract the word of the word type specified by the above operation from the text. (5) In response to the above operation, the control unit 2 activates the word extraction unit 12. (6) The word extraction unit 12 refers to the temporary storage unit Z1 and extracts the synonym dictionary unit 4 from the sentences stored in the text storage unit 3.
Extracts the word of the specified word type using
(not shown). (7) Next, the word extraction unit 12 activates the synonym search unit 13. (8) The synonym search unit 13 uses the synonym dictionary unit 4 to search for all synonyms of the words stored in the temporary storage unit Z2, and stores them in the temporary storage unit Z3 (not shown). (9) Next, the synonym search unit 13 activates the determination unit 14. (10) The determination unit 14 refers to the temporary storage units Z1 and Z3, and among the synonyms searched by the synonym search unit 13,
Determine whether there are synonyms other than the specified word type. (11) If it is determined by the operation that there is a synonym other than the specified word type, the determination unit 14 activates the word display unit 15 and the synonym display unit 16. (12) The word display section 15 refers to the temporary storage section Z2, and displays a corresponding expression with an underline as shown in FIG. 5 for a word in the sentence that is determined to have a synonym. Further, the synonym display section 16 stores temporary storage sections Z1 and Z.
3, for the word displayed by the word display unit 15, synonyms of word types other than the designated word type are numbered and displayed on the output unit 19 as shown in FIG. (13) Next, the synonym display unit 16 activates the synonym selection unit 17. (14) The synonym selection unit 17 receives a number input by the operator, selects one word from among the synonyms displayed on the output unit 19 based on the number, and stores the selected synonym in the temporary storage unit Z4. (not shown). (15) Next, the synonym selection unit 17 activates the expression replacement unit 18. (16) The expression replacement unit 18 refers to the temporary storage units Z2 and Z4, and replaces the word in the sentence displayed by the word display unit 15 with the synonym selected by the synonym selection unit 17,
The results are displayed on the output section 19 as shown in FIG. (End) The specific operation of the Japanese text proofreading apparatus of this embodiment, which operates as described above, will now be described.

After creating the text, the operator stores the text in the text storage section 3 at the stage of proofreading. Here, it is assumed that the operator has a goal of reducing the number of foreign word expressions in the document. It is also assumed that the stored sentences include similar synonyms of different word types, as shown underlined in FIG. (1) The operator inputs an instruction to display the distribution status from the input unit 1 in order to display the frequency of foreign words included in a sentence. Then, the control section 2 activates the word type discrimination section 5. (2) The word type determination unit 5 determines the type of word for all words in a sentence that are classified as Chinese, Japanese, or foreign words. Based on the results, the distribution status calculation unit 6 calculates the frequency of words for each word type, and the distribution status display unit 7 displays the frequency on the display unit 19. In this case, as shown in FIG. 3, it can be seen that the sentence contains a foreign word. (3) Next, the operator inputs an instruction to that effect from the input unit 1 in order to display synonyms of different word types included in the text. Then, the control unit 2 activates the synonym extraction unit 8. (4) The synonym extraction unit 8 extracts all words in a sentence that have a synonymous relationship with each other. Based on the result, the inconsistency determining unit 9 determines whether the extracted words include words of different word types. If it is determined that words of different word types are included, the inconsistent display unit 10 displays those synonyms on the output unit 19. In this case, "duplicate", "duplicate", and "copy" in the text are extracted and displayed as shown in FIG. (5) Next, in order to remove foreign words from the text, the operator inputs an instruction from the input unit 1 to specify the type of word to be removed. Then, the control unit 2 activates the word type designation unit 11. The word type designation unit 11 specifies a foreign word as a specific word type in accordance with an input from the input unit 1 by the operator. (6) Next, the operator inputs an instruction to extract a word of the specified word type from the input unit 1 in order to extract the word of the specified word type from the text. Then, the control unit 2 controls the word extraction unit 1
Start 2. The word extraction unit 12 extracts a foreign word that is a specified word type from a sentence. In this case, "copy" in the text is extracted. (7) For the extracted foreign word, the word extraction unit 12 activates the synonym search unit 13 to search for a synonym for the extracted word. Further, the synonym search unit 13 activates the determination unit 14 . The determining unit 14 determines whether there is a synonym that is not a foreign word among the extracted words. In this case, synonyms that are not foreign words include "copy" and "copy." Next, the determination unit 14 activates the word display unit 15 and the synonym display unit 16. (8) The word display section 15 displays the foreign word "copy" in the text, and the synonym display section 16 displays the synonyms "copy" and "copy" of other word types on the output section 19, and further displays the synonym selection section 17. to start. In this case, as shown in FIG. 5, "copy" in the text is displayed with an underline, and at the same time, similar words are displayed with numbers attached. (9) The synonym selection unit 17 accepts the operator's input of a number, and selects one of the synonyms displayed by the synonym display unit 16 according to the number. Here, number 1 is “
"Copy" is selected. (10) When one synonym is selected, the synonym selection section 17
starts the expression replacement unit 18. (11) The expression replacement unit 18 replaces the corresponding part of the expression "copy" displayed in the text with the selected expression "copy". In this case, as shown in FIG. 6, the status as a result of replacing similar synonyms is displayed on the output unit 19. (End) As mentioned above, in this example, by displaying the frequency of Chinese words, Japanese words, and foreign words included in a sentence, it is possible to easily determine whether a foreign word that should be removed exists in a sentence. can do. In addition, by displaying synonyms for different word types contained in a sentence, it is easy to check what kind of Chinese or Japanese synonyms are used in the sentence for the foreign word to be removed. be able to. Furthermore, by specifying the word type ``loan words'' and extracting words from the text, it is possible to easily identify only the foreign words that are intended to be removed from the text. Furthermore, for the extracted foreign words, Chinese
Only synonyms of Japanese words are presented, and synonyms of foreign words are not presented. Therefore, desired synonyms can be presented in a small display area. Further, when selecting a word to be replaced, the operator does not need to judge whether the presented synonym is a foreign word. Furthermore, since an underline is used to display a foreign word in a sentence, the operator can easily confirm the position of the corresponding word in the sentence. These reduce the burden of judgments made by the operator. Furthermore, when replacing an extracted loan word with a word from another word type, the corresponding loan word is replaced with a synonym selected by number designation, eliminating the need for the operator to input the word directly. complexity is reduced.

[0017] In this embodiment, the synonym dictionary is Chinese,
Although it is assumed that the information has information for discriminating word types such as Japanese words and foreign words, it may also have word types such as onomatopoeic words and mimetic words.

[0018] In this embodiment, the frequency of words is displayed when displaying the distribution status of each word type, but in addition to this, the ratio of each word type to the total words can be displayed, and the extracted words can also be displayed. The words may be displayed using a method such as underlining or inverted display that allows each word type to be distinguished, or only the presence or absence of each word type may be displayed.

Note that in this embodiment, synonyms for different word types in a sentence are displayed for each word type as shown in FIG. good.

[0020] In this embodiment, when displaying a specified word type in a sentence, an underline is used as shown in Fig. 5, but there are other ways to display it, such as reverse display and changes in brightness. It may also be displayed using a method that allows discrimination by word type.

[0021] In this embodiment, when presenting synonyms of word types other than the specified word type, numbers are added and listed near the displayed words. Can be displayed in a different position, such as in a lower line, without numbers, or by displaying candidate words one by one according to the operator's instructions without listing the words. good.

[0022] In this embodiment, when selecting a word from the presented synonym candidates, the word is designated by number, but it is also possible to select it directly by using other indicating means such as a mouse. Alternatively, in the case of displaying candidate words one by one, you may enter the word selection decision when the word you want to select is displayed, and then select the word that was displayed at that time. .

[0023] In this example, when replacing a word displayed in a sentence with a selected word, only the word in the corresponding part is replaced in one replacement, but other than that, one replacement can also be performed. For example, you can replace all the same expressions in a sentence with .

[0024]

[Effects of the Invention] In the Japanese text proofreading device of the present invention, when proofreading synonyms included in a Japanese text, the distribution status of each word type of words included in the text is displayed. This allows the operator to easily determine whether or not the text contains a specific word type that the operator is trying to proofread. Furthermore, when a sentence includes synonyms of different word types, by displaying that portion, it is possible to easily identify the words of each type of synonym used in the sentence. Furthermore, by displaying words of a specified word type contained in a sentence and displaying only synonyms of other word types for that word, it is possible to avoid displaying synonyms that do not need to be displayed, and to reduce the The synonyms can be displayed in the display area, reducing the burden on the operator when selecting synonyms. By replacing the word in the displayed sentence with a word of another selected word type, the operator does not have to input a new word, and the word in the sentence that should not be used can be replaced with another word type. can be replaced with the word . Due to these, its practical effects are great.

[Brief explanation of the drawing]

[Fig. 1] A configuration diagram of a Japanese text proofreading device according to an embodiment of the invention.

[Figure 2] Schematic diagram showing examples of sentences using synonyms across different word types

[Figure 3] Schematic diagram of an example of displaying the frequency of each type of word contained in a sentence

[Figure 4] Schematic diagram of an example of displaying synonyms across different word types included in a sentence

[Figure 5] Schematic diagram of a presentation example of a word of a specified word type in a sentence and its synonyms of another word type

[Figure 6] Schematic diagram of a display example of a sentence corrected by word replacement

[Figure 7] Configuration diagram of a conventional device

[Figure 8] Configuration diagram of a conventional device

[Explanation of symbols]

3 Text storage section 4　Synonym Dictionary Department 5 Word type discrimination section 6 Distribution situation calculation section 7 Distribution status display section 8 Synonym extraction part 9 Inconsistency judgment section 10 Inconsistent display section 11 Word type specification section 12 Word extraction part 13 Synonym search section 14 Judgment section 15 Word display section 16 Synonym display section 17 Synonym selection section 18 Expression replacement part

Claims (8)

[Claims] [Claim 1] When proofreading a Japanese document, a word type that determines which word type the word belongs to for all words in the text that are classified at least into the word types of Chinese, Japanese, and foreign words. It is characterized by executing a discrimination step, a distribution situation calculation step for calculating the distribution situation for each word type, and a display step for displaying the calculated distribution situation, and displaying the distribution situation for each word type of words included in the sentence. How to proofread Japanese documents. [Claim 2] A text storage unit that stores sentences; a synonym dictionary that stores a large amount of information that distinguishes at least Chinese, Japanese, and foreign words in association with words; and at least a synonym dictionary that stores at least Chinese, Japanese, and foreign words in the sentences. , a word type discriminator that determines which word type the word is for all words classified into the word type foreign words, a distribution status calculation unit that calculates the distribution status of each word type, and a calculated distribution. 1. A proofreading device for Japanese documents, comprising a distribution status display section for displaying the status, and displaying the distribution status of word types of words included in a sentence. [Claim 3] When proofreading a Japanese text, there is a synonym extraction step for extracting all mutually synonymous words contained in the text, and whether the extracted synonyms contain words of different word types. The invention is characterized by executing an inconsistency determining step for determining whether there is an inconsistency, and an inconsistency displaying step for displaying the corresponding expression if there is an inconsistency, and displaying synonyms of different word types if there are synonyms in the sentence. How to proofread Japanese sentences. Claim 4: A text storage unit that stores sentences; a synonym dictionary unit that stores a large amount of information that distinguishes at least word types such as Chinese, Japanese, and foreign words in association with words; There is a synonym extraction unit that extracts all of a certain word, an inconsistency judgment unit that determines whether the extracted synonyms contain words of different word types, and an inconsistency judgment unit that displays the corresponding expression if there is inconsistency. A proofreading device for Japanese documents, comprising a unified display section, and displaying synonyms of different word types in a sentence, if any. [Claim 5] When proofreading a Japanese text, there is a word type specification step for specifying the word type, a word extraction step for extracting words of the specified word type from the text, and searching for all synonyms of the extracted words. a synonym search step, a determination step for determining whether there is a synonym of a word type different from the word type specified in the word type specification step among the searched synonyms, a word display step for displaying the corresponding word in the sentence, and a specification step. Execute the synonym display step to display synonyms of a word type other than the specified word type, and if a word of the specified word type is present in the sentence and the corresponding word has a synonym of another word type, the corresponding word is displayed. A method of proofreading Japanese sentences characterized by presenting the synonyms along with the synonyms. [Claim 6] A text storage unit that stores sentences, a word type specification unit that specifies word types, a word extraction unit that extracts words of the specified word type from the text, and at least word types such as Chinese, Japanese, and foreign words. a synonym dictionary section that stores a large amount of information that associates differentiating words with words, a synonym search section that searches for all synonyms of the extracted word, and a synonym search section that searches for all synonyms of the extracted word, and a synonym search section that searches for all synonyms of the extracted word, and a synonym search section that searches for all synonyms of the extracted word, and a synonym search section that searches for all synonyms of the extracted word. A determination unit that determines whether there is a synonym for , a word display unit that displays the corresponding word in a sentence, and a synonym display unit that displays synonyms of a word type other than the specified word type. A proofreading device for a Japanese document characterized in that, when a word exists in a sentence and the corresponding word has a synonym of another word type, the synonym is presented together with the corresponding word. [Claim 7] When proofreading a Japanese text, the synonym selection step selects one of the synonyms displayed in the synonym display step, and the expression replacement step replaces the corresponding expression in the text with the selected synonym. 6. The method of proofreading a Japanese text according to claim 5, further comprising the step of adding the selected synonym and replacing the expression in the text with the selected synonym. [Claim 8] A synonym selection section that selects one of the synonyms displayed in the synonym display section and an expression replacement section that replaces the corresponding expression in the sentence with the selected synonym are added, and the expression in the sentence is selected. 7. The Japanese document proofreading apparatus according to claim 6, wherein the Japanese document proofreading apparatus replaces the synonyms with the same synonyms.