日琉祖語 にちりゅうそご Meanings Noun Proto-Japonic (language); Proto-Japanese; Proto-Japanese-Ryukyuan Kanji 日 day. Read as ニチ. 琉 precious stone; gem; lapis lazuli. Read as リュウ. 祖 ancestor 語 language. Read as ゴ. Jinuma: Japanese Dictionary · Word lists