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The Hakurouken (白楼剣) and Roukanken (楼観剣), are weapons used by Youmu Konpaku. Roukanken, or the Lookout-Tower Sword, is a long-bladed katana said to be made by youkai and cannot be wielded by normal humans. It's said that it has the power to kill ten spirits in one stroke, but as one cannot actually kill spirits, the truth of this claim is debatable. The Hakurouken, or the White Tower Sword, is the ancestral sword of the Konpaku family. It has the power to dispel the confusion of those it cuts. That is, using it on ghosts will cause them to attain enlightenment (Sikieiki has said that what Youmu's doing to the spirits is a form of "cheating"), and using it on humans will cause them discomfort and a bit of pain.

Youmu wields both of the swords in Perfect Cherry Blossom, Imperishable Night, Phantasmagoria of Flower View, Shoot the Bullet and Scarlet Weather Rhapsody but not in Immaterial and Missing Power.

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