Search gender: all male female コハ Japanese Boy Names Variations. 1 names found. gender: all male female Name: koha Katakana: コハ 0 Kanji: 琥羽 Meaning: 琥A gemstone in the shape of a tiger. A yellow or yellowish-brown stone. 羽Feathers. Insect wings. Wings. A word for counting birds and rabbits. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > コハ Japanese Boy Names Variations.