Save Gender Masculine Usage Japanese Scripts 康二, 泰司, 保次, 泰治, etc.(Japanese Kanji) Pronounced Pron. YAH-SOO-ZHEE [key] Meaning & History From 康 (yasu) meaning "peaceful" or 保 (yasu) meaning "to guard, to protect" combined with 二 (ji) meaning "second", 司 (ji) meaning "official, to take charge" or 治 (ji) meaning "to rule, to govern, to administrate".