Search gender: all male female サダトウ Japanese Boy Names Variations. 1 names found. gender: all male female Name: sadato Katakana: サダトウ 0 Kanji: 貞任 Meaning: 貞Correct. The heart is right. 任To leave to others. A role or matter to be fulfilled. Guarantee. To assign to an official position. To give a role to. To let do as one pleases. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > サダトウ Japanese Boy Names Variations.