(childish) one's own father: daddy / (by later extension) a husband, master of the house

(medicine) rigor mortis

one day

Short for 年回忌 (nenkaiki): death anniversary

(Buddhism) death anniversary of a sect founder, or the memorial service thereof

one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument

(colloquial) current boyfriend

everything

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

everyone, one and all