JLPT N1 Vocabulary 暗算 (anzan) mental arithmetic JLPT N1 Learning Done Flashcards Recall mode Meaning 暗算 (あんざん, anzan) is a JLPT N1 vocabulary word meaning “mental arithmetic”. Kanji in this word 暗 darkness 算 calculate Example sentences 1 彼かれは 暗算あんざんが 出来できるほどの 頭脳ずのうを 持ち合もちあわせていない。 He's not smart enough to add numbers in his head. ← Previous画期 All N1 vocabulary Next →驚異