Gōsutoburēdo

A blade said to have come from the depths of the underworld. It is the signature weapon of Seiji Kurgari, who uses the blade frequently against those who are powerful opponents. The blade is used for two different reasons. The first is the obvious reason. Like every other blade it is used to cut, tear, rip, shread, or to stab the opponent, but the second reason is the blade can cut through and absorb chakra. The absorbed chakra can either be channeled into the user or be used to make the blade more powerful. It is a chakra blade that needs a constant supply of chakra when it is used. Because of this only a user of the Dark Release Kekkei Genkai is capable of using the blade.

On more than one occasion the blade has been thought to be one of the weapons of the Seven Swordsmen of the Mist. Seiji has been seen referring to the blade as his comrade, giving off the impression that the blade is alive and that they are linked together.