1000 or more onomatopoeias and mimesis are used in Japanese. It is said that there is the number of onomatopoeias also 3 times compared with a European and American language. It is sometimes difficult to tell an intention, without using these onomatopoeias. The original form of Japanese language is called “Yamato Kotoba”, and it is thought that mimesis and onomatopoeias are the modes of expression representing Japan. Here, it introduces focusing on onomatopoeias.