Tengoku (aka "Heaven") is a sword handed to Joukyuu Kunitoshi by the great martial artist called Houjo Kaneoto. Tengoku is a meitou(famous sword) wich at the tip of the blade is double-edged. Joukyuu said it might even be a national treasure from the Showa era. Inside the hilt of tengoku is a microchip which purpose is as of yet unknown.

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