主立つ おもだつ Also written 主だつ, 重立つ Meanings Godan verb, Intransitive to be main; to be principal; to be important (usu. prenominal as 〜た) See also: 主だった (おもだった). Kanji 主 main. Read as おも. 立 stand. Read as たつ. Jinuma: Japanese Dictionary · Word lists