思い立つ おもいたつ Also written 思いたつ Meanings Godan verb, Transitive to set one's mind on doing; to get the idea of doing; to make up one's mind Kanji 思 think. Read as おもう. 立 stand. Read as たつ. Example sentences 思い立ったが吉日!Tomorrow never comes. Jinuma: Japanese Dictionary · Word lists