Search gender: all male female マスオミ Japanese Boy Names Variations. 1 names found. gender: all male female Name: masuomi Katakana: マスオミ 0 Kanji: 益臣 Meaning: 益Increase. Something that is beneficial to people and the world. Something that is useful. Profit. 臣Vassal. A servant. One who serves a lord. People in general. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > マスオミ Japanese Boy Names Variations.