close friend, bosom buddy / crony, chum

井桁: well lining, or the symbols #, ＃, or ♯

井桁: a surname

下駄: Traditional Japanese wooden clogs.

a surname

a puteal: a wellhead for a water well, traditionally consisting of a wooden enclosure framed along the top, and possibly bottom, with stout wooden beams crossed at the ends / the symbols #, ＃, or ♯

Alternative spelling of 下駄

(chiefly women's speech) first person singular pronoun: I, me

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness