黒鍵 こっけん noun (common) (futsuumeishi) 黒鍵こっけん Noun English JMdict (multilingual) 1 noun (common) (futsuumeishi) black key (on a piano, organ, etc.) See also: 白鍵 (はっけん) 漢字 kanji used 黒 black 11画 鍵 key 17画
黒鍵こっけん Noun English JMdict (multilingual) 1 noun (common) (futsuumeishi) black key (on a piano, organ, etc.) See also: 白鍵 (はっけん)