Jisho

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けんふねきざ
Expressions (phrases, clauses, etc.)
1. to not be getting with the times; to be unaware that things are changing; to drop one's sword (in the river) and carve (a mark) on the boat (to mark the spot where the sword was dropped)Idiomatic expression, from a story in Master Lü's Spring and Autumn Annals

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