to use one's head

use one thing for many purposes / work someone hard

more haste, less speed; slow and steady wins the race

(idiomatic) deceased person

make hay while the sun shines, strike while the iron is hot, act on an opportunity promptly

welcome home (said by a person greeting another coming back home, a stock phrase required by the Japanese etiquette)

(colloquial) current boyfriend

everything

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all