the first / (mathematics, attributive) the quality of being first-degree

Used other than figuratively or idiomatically: see 一 and 本 (one thing) / Short for 一本勝ち (ippon-gachi, “winning in one blow”).

a night

solely / only, simply / alone, automatically, by itself, naturally

a female given name

one person / the first or top person in a particular place or field / Synonym of 右大臣 (udaijin): a minister of the right in the imperial Council of State

a male given name

one (of anything) / a, an

one (of anything) / a, an

(literary) an alternate name