Japanese is a national language of Japan spoken by more than 124 million people, which is the 6th largest speaking population in the world. Other than Japan, some states in Republic of Palau speak Japanese as common language, and people in some part of Brazil uses Japanese due to the migration from Japan.

Phonology of Japanese have a strong personality of open syllable language that ends with a vowel, also many dialects, including the common language has a mora. Accent is pitch accent. Japanese consists of word order of "subject-modifier-predicate". Modifier is located in front of modifiee. Moreover, in order to show the case of noun is not alter the word order and ending, to add function words representing a grammatical function (particle) behind. Therefore, on the language typology, Japanese is the language of the SOV type in terms of word order, and in terms of form is classified as agglutinative language.