今是昨非 こんぜさくひ Meanings Expression complete reversal of values or ways of thinking (over time); What appeared wrong in the past now appears right; realizing and regretting the past errors of one's ways Kanji 今 this. Read as コン. 是 affirm 昨 yesterday. Read as サク. 非 non-. Read as ヒ. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists