Vocabulary What does ~歳 (~さい) mean? ~歳 (~さい, ~sai) means counter for age (years old). Quick factsReading~さいRomaji~saiLevel (estimated, JLPT framework)N5 ~歳~さいN5 · estimated, JLPT framework~saicounter for age (years old)Example sentences妹(いもうと)は八歳(はっさい)です。My younger sister is eight years old.私(わたし)は十九歳(じゅうきゅうさい)です。I am nineteen years old.Kanji in this word歳years of age; year