“Broad-shouldered physique” in Japanese
Short answer
Broad-shouldered physique in Japanese is “恰幅” (kappuku). Full meaning: large, broad-shouldered physique (esp. that of a middle-aged man), big build.
Other ways to say “Broad-shouldered physique” in Japanese
格幅
kappuku large, broad-shouldered physique (esp. that of a middle-aged man), big build
かっ幅
kappuku large, broad-shouldered physique (esp. that of a middle-aged man), big build
かっぷく
kappuku large, broad-shouldered physique (esp. that of a middle-aged man), big build
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