Chinese characters were introduced into Japan from China in ancient times. In the process of borrowing Chinese characters and Chinese vocabulary from China, the Japanese did not completely adopt the method of "takenism", but reformed it according to the needs, and created a large number of Chinese neologisms by using Chinese characters. This paper discusses the background of Japanese Chinese neologisms and their coinage methods from a historical perspective, which not only shows the great role of Chinese characters and Chinese in the formation and development of Japanese, but also reveals the great influence of Japanese neologisms on modern Chinese in China.

Japanese is transformed from Chinese, and some radicals in Chinese are separated from the original words and given new meanings. Japanese is the inherent language of Yamato people, and it belongs to Altai language family just like Korean and Mongolian. Japanese has been greatly influenced by Chinese and other languages in its emergence and development. Some Japanese linguists believe that some common words in Japanese, such as "Ma", "Mei" and "Mi", are very similar to Chinese in pronunciation, probably because of the influence of China people. The formation of Chinese characters is deeply influenced by Chinese in China.

Japan has a relatively short written history. The earliest existing written materials were produced in the 5th century A.D. and recorded in Chinese. In 478 AD, one of the Japanese rulers at that time, Japanese Wu Wang's credentials to the emperor of the Southern Dynasties in China were also written in Chinese. Later (about AD 10 century), the Japanese created Japanese letters-Hiragana (such as an-ぁ; with-ぃ； yu-ぅ； Yi-ぇ: Yu-ぉ), created katakana (such as a-; i-ィ； Yu-ゥ； jiang-ェ； Yu-ォ), thus gradually forming a Japanese writing method combining Chinese characters with pseudonyms, which has been used to this day.

At present, there are 198 1 Chinese characters in the list of commonly used Chinese characters published by the Japanese government. If you add 166 "Characters for Names" published by the Ministry of Justice, there will be 211. However, Dahe Dictionary compiled by Zhu Qiao Ji Zhe contains more than 50,000 Chinese characters. Most of these Chinese characters are absorbed from China, and only a few are Japanese-created "Harmony Characters". There are actually 48 pseudonyms in Japanese. But because each pseudonym is written in Hiragana and Hiragana, there are 96 pseudonyms.

Grammatically speaking, Japanese is an adhesive language, that is, it mainly relies on the adhesion of auxiliary words and verbs to express the position of words in sentences and grammatical functions such as tense, negation, deduction, passivity and possibility. The word order of Japanese is that the predicate is at the end of the sentence, that is, after the object and complement, rather than at the front like Chinese and English.