他山の石 (たざんのいし) — lesson learned from someone's else mistake; object lesson; food for thought; stones from other mountains (can be used to polish one's own gems)
他山の石
た ざ ん の い し
た ざ ん の い し
Lesson learned from someone's else mistake; object lesson; food for thought; stones from other mountains (can be used to polish one's own gems)
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