Search gender: all male female コウオウ Japanese Boy Names Variations. 1 names found. gender: all male female Name: koo Katakana: コウオウ 0 Kanji: 光黄 Meaning: 光Light. Glow. Glitter. Honor. Fame. Brilliance. Scenery. The way it is. Big. Wide. Blessings. Words used to honor the actions of others. 黄Yellow. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > コウオウ Japanese Boy Names Variations.