the act of swinging something one time / a katana

(military) captain (Japanese Air Self-Defense Forces, Japanese Ground Self Defense Forces) / (military) lieutenant (senior grade) (Japanese Maritime Self-Defense Force)

(informal) having divorced before

(alcoholism) Synonym of 一杯 (ippai, “one cup”) / (alcoholism) drinking

a day or two / today or tomorrow / tomorrow or the day after tomorrow

a male given name

one part

Synonym of 千夜一夜物語 (Sen'ya Ichiya Monogatari, “One Thousand and One Nights”)

each person has one life, regardless of social class or circumstances

"Historical kana usage", a prescriptive method of using kana to write Japanese. Devised in the Edo period by Keichū (契沖) and taught in schools until 1946, it aims to be etymologically faithful and reflects earlier stages of the language (Heian period and earlier).