一 いつ Meanings Number one See also: 一つ (ひとつ). Noun same (mind, path, etc.) See also: 一に (いつに). Kanji 一 one. Read as イツ. Words containing 一 一緒 (いっしょ) (doing) together 一方 (いっぽう) one (esp. of two) 一旦 (いったん) once And 1132 more. Jinuma: Japanese Dictionary · Word lists