背筋 はいきん noun (common) (futsuumeishi) Also 背筋: せすじ spine 背筋はいきん Noun English JMdict (multilingual) 1 noun (common) (futsuumeishi) muscles of the back;back muscles 漢字 kanji used 背 stature, height 9画 筋 muscle, sinew 12画
背筋はいきん Noun English JMdict (multilingual) 1 noun (common) (futsuumeishi) muscles of the back;back muscles
Shirabe