one

(military, of the Japan Air Self-Defense Force) a warrant officer

(military, of the Japan Maritime Self-Defense Force) a warrant officer

(military, of the Japan Ground Self-Defense Force) a warrant officer

Synonym of 黄昏 (tasogare, “dusk; twilight”) / Synonym of 黄昏時 (tasogaredoki, “dusk; twilight”)

one day, 24 hours / the daytime, the period from dawn until dusk / (figuratively) a short period of time / one day, someday, an unspecified day / the first day of the month

(literally) one side / everywhere, all around, the whole area / one viewpoint, one opinion or way of thinking / the front page of a newspaper

for the time being, for the present

the basics, a general idea

You should treasure every encounter, for it will never recur.