This research is a basic survey of domestically studied research to compare three linguistic materials - in particular Japanese, in order of field and release time. This is to confirm concrete research results by field to be continued. The above survey results are summarized as follows.
In the 1st term (1956-1980), there are few people learning or studying Japanese, and although I knew the existence of the repair book, I could not see the real thing, There were few related work.
In the 2nd term (1981-2000), about 30% (54) of the survey subjects fall. Of those, about 70% of grammar, vocabulary and honorific-language papers are occupied.
In the third period (2001 - 2016), about 70% (117) of the survey subjects fall. Among them, about 70% of articles in grammar and vocabulary fields are occupied. Honorifics related research is limited to 1%.