"日本刀"是个多义词，它可以指日本刀（日本武士刀）,日本刀（美国DC漫画旗下超级英雄）。
所以我在日本刀茎上做了修改，这样带螺丝扣的柄头可以使用。
So I came up with a modification of the Japanese tang such that a pommel screw could be used.
有一件事，日本刀的柄头只是连接在木头柄上，没有连接在刀茎上。
But... there was one thing... the pommel or butt cap of the Japanese sword is attached only to the wood of the handle. It is not structurally connected to the tang.
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