Save Gender Masculine Usage Japanese Scripts 靖光, 康光, 保光, 泰光, etc.(Japanese Kanji) Pronounced Pron. YA-SOO-MEE-TSOO [key] Meaning & History Japanese masculine name derived from either 保 (yasu) meaning "protect, safeguard" or 靖, 泰, or 康 (yasu) all meaning "peaceful" combined with 光 (mitsu) meaning "light, bright, radiance".