口部 こうぶ Meanings Noun oral region; regio oralis kanji radical for "mouth" Kanji 口 mouth. Read as コウ. 部 part. Read as ブ. Words containing 口部 開口部 (かいこうぶ) aperture 読取り書込み開口部 (よみとりかきこみかいこうぶ) read-write slot 鼻口部 (びこうぶ) muzzle (of a dog, cat, etc.) Word lists Anatomy Jinuma: Japanese Dictionary · Word lists