Search gender: all male female コトウ Japanese Girl Names Variations. 1 names found. gender: all male female Name: koto Katakana: コトウ 0 Kanji: 瑚冬 Meaning: 瑚Name of the instrument. A vessel used to hold the five grains of rice and offer them to a religious temple. A character used for coral. 冬Winter. One of the four seasons. Refers to the period from December to around February. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > コトウ Japanese Girl Names Variations.