“Back muscles” in Japanese
Short answer
Back muscles in Japanese is “背筋” (sesuji). Full meaning: spine, line of the backbone; seam down the back (of clothing); muscles of the back, back muscles.
Other ways to say “Back muscles” in Japanese
背すじ
sesuji spine, line of the backbone; seam down the back (of clothing); muscles of the back, back muscles
せすじ
sesuji spine, line of the backbone; seam down the back (of clothing); muscles of the back, back muscles
背スジ
sesuji spine, line of the backbone; seam down the back (of clothing); muscles of the back, back muscles
セスジ
sesuji spine, line of the backbone; seam down the back (of clothing); muscles of the back, back muscles
脊筋
sesuji spine, line of the backbone; seam down the back (of clothing); muscles of the back, back muscles
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