The Katana Giri is an item in Red Steel. It's a sword that was in Isao Sato's clan for many generations and the Yakuza were after it.

The Yakuza kidnapped Sato's daughter Miyu and threatened to kill her if he didn't hand over the sword. So Miyu's fiancee Scott Monroe set out to rescue her and stop the Yakuza. He also took the sword along with him and used it against his enemies.

It was later stolen by Tokai, but Scott managed to take it back.

During the final battle, the sword becomes broken.