いっしんさんがん 一心三観 LinksSentence search for 一心三観Sentence search for いっしんさんがんKanji details for 一, 心, 三 and 観Edit in JMdict Noun1. simultaneous contemplation of the threefold truth (form of Tendai meditation)Buddhism, See also 三諦 Discussions Log in to talk about this word.