What is Sumigomori(炭籠り)?

sumigomori japanese sword

  • Sumigomori, which literally means “Charcoal Left Inside”, refers to the tiny hole or hollow in the blade. The hole is a mark of a fragment of charcoal and made in the sword forming process.
  • Sumigomori is often confused with KITAE-WARE(鍛え割れ) because they look kind of alike. So that people mistakingly consider the sword with Sumigomori hasn’t been forged well. But Sumigomori has nothing to do with the durability and the cutting ability of the sword.

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