(あし)(こう)

あしのこう
noun
top of the foot; instep
body-part
1. top of the foot; instep
The upper, arched surface of the foot, opposite the sole; the instep.
(あし)(こう)(いた)
The top of my foot hurts.
(あし)(こう)日焼(ひや)けしてしまった。
I ended up sunburning the top of my foot.
The new shoes press on the top of my foot, and it hurts every time I walk.

(あし) (foot) + (こう) (shell; upper/back surface). The arched top of the foot, contrasted with (あし)(うら) (the sole).

Common collocations

Similar words