一段活用 いちだんかつよう Meanings Noun ichidan verb conjugation See also: 五段活用 (ごだんかつよう). See also: 一段動詞 (いちだんどうし). Kanji 一 one. Read as イチ. 段 step. Read as ダン. 活 active. Read as カツ. 用 use. Read as ヨウ. Words containing 一段活用 上一段活用 (かみいちだんかつよう) conjugation (inflection, declension) of ichidan verbs ending in "iru" 下一段活用 (しもいちだんかつよう) conjugation (inflection, declension) of ichidan verbs ending in "eru" Word lists Grammar Jinuma: Japanese Dictionary · Word lists