温故 おんこ知新 ちしん
onkochishin

Noun

1. developing new ideas based on study of the past; learning from the past

Yojijukugo
温故 おんこ知新 ちしんというからねえ。歴史 れきし勉強 べんきょう大切 たいせつだよ。
onkochishinto iukaranē. rekishino benkyōwa taisetsudayo.
They say you should consult the past if you want to learn about the future. History has a lot to teach us.
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