Save Gender Feminine Usage Japanese Scripts 湖空, 心空, etc.(Japanese Kanji) Pronounced Pron. KO-SO-ṘAH [key] Meaning & History From Japanese 湖 (ko) meaning "lake" or 心 (ko) meaning "heart, mind, soul" combined with 空 (sora) meaning "sky". Other combinations of kanji characters can also form this name.