Japanese (日本語, Nihongo is an East Asian language spoken by about 128 million people, primarily in Japan, where it is the national language. It is a member of the Japonic (or Japanese-Ryukyuan) language family, and its ultimate derivation and relation to other languages is unclear. Japonic languages have been grouped with other language families such as Ainu, Austroasiatic, Korean, and the now-discredited Altaic, but none of these proposals have gained widespread acceptance.
Japanese is an agglutinative, mora-timed language with relatively simple phonotactics, a pure vowel system, phonemic vowel and consonant length, and a lexically significant pitch-accent. Word order is normally subject–object–verb with particles marking the grammatical function of words, and sentence structure is topic–comment. Sentence-final particles are used to add emotional or emphatic impact, or make questions. Nouns have no grammatical number or gender, and there are no articles. Verbs are conjugated, primarily for tense and voice, but not person. Japanese adjectives are also conjugated. Japanese has a complex system of honorifics, with verb forms and vocabulary to indicate the relative status of the speaker, the listener, and persons mentioned.