膀胱括約筋 ぼうこうかつやくきん Meanings Noun sphincter muscle of urinary bladder Kanji 膀 bladder. Read as ボウ. 胱 bladder. Read as コウ. 括 tie up. Read as カツ. 約 promise. Read as ヤク. 筋 muscle. Read as キン. Jinuma: Japanese Dictionary · Word lists