《Five Books of Music》

Japanese: 《音学五書》 - おんがくごしょ

…The “Richiroku” is a work that consistently maintains a strict academic attitude, and has shown the methods and ways of academic study to the scholars who followed him. The “Five Books of Phonetics” is the result of ancient phonological research to interpret the classics linguistically, and his examination of the rhymes in the “Book of Songs” and dividing ancient rhymes into 10 parts led to Duan Yutai’s later theory of 17 parts of ancient rhymes. He is considered a first-class poet of his time, and his poetry is permeated with the spirit of “poetry expresses ambition.” …

From [Characterology]

…The study of ancient sounds produced particularly remarkable results. First, Gu Yanwu wrote the Five Books of Phonetics, dividing ancient sounds into 10 parts. Next, Jiang Yong wrote the Ancient Rhyme Standard, dividing them into 13 parts, Duan Yucai divided them into 17 parts in the Six Books Phonetic Table, and Dai Zhen wrote the Phonetic Class Table, dividing them into 9 classes and 25 parts. …

*Some of the terminology explanations that refer to the "Five Books of Ongaku" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…《日知録》は一貫して厳しい学的態度を持し，彼につづく学者たちに学問の方法とそのありかたを示すこととなった著述である。古典を言語学的に読解するための古代音韻研究の成果が《音学五書》で，《詩経》の押韻を調べて古韻を10部に分けたのが，のちの段玉裁の古韻17部説をみちびく。詩文のうえでも当時一流の作手と目されるが，その詩は〈詩は志を言う〉の精神をもって貫かれている。…