いちこつ 壱越 LinksSentence search for 壱越Sentence search for いちこつKanji details for 壱 and 越Edit in JMdict Noun1. fundamental tone in the traditional Japanese 12-tone scale (approx. D)Music, See also 黄鐘 こうしょう, See also 十二律 Discussions Log in to talk about this word.