Tongwentongkao, which is a stated by Japanese scholar Mr.Araihakuseki Druing the Edo period of Japan,is with reference to vulgar form of characters,reflecting the features of diction and the real condition of characters in the middle period of Edo in Japan. This book discusses the origin and development of Hanzi in both Chinese and Japanese from the perspective of the cultural cycle of the Chinese characters on the basis of the fact that the Chinese characters exist in Chinese as well as in Japanese. In its volume four, it records some information about Chinese characters that can not be found in Chinese documents. According to its relation with Chinese characters ,the author divided those information into six types.Broadly speaking, those five types can be classified as Wosuzi with the exception of GuoXun. The classification and identification of Wosuzi is flawed on some level due to the limitation of era in which the author lived.In spite of the limitations mentioned above, TongWenTongKao still reflects the basic situation regarding the usage of Chinese characters in the society of Edo period of Japan and represents the research progress on this subject at that time. This book has a profound influence on the study of Chinese characters in Japan and holds a significant value in the comparative research of Chinese characters between Chinese and Japanese.