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heirloom
この掛け軸は代々伝わる家宝だ。
This hanging scroll is a family heirloom passed down for generations.
家宝を大切に保管している。
I carefully preserve the family heirloom.
祖父から家宝の刀を受け継いだ。
I inherited a sword that is a family heirloom from my grandfather.