The katana is a two-handed weapon that can be obtained as a very rare reward from eliteTreasure Trails. It requires 40 Attack to wield. Compared to a rune scimitar, while the Katana has better defensive stats, it has 4 less strength bonus and is two-handed, making the use of a defender or a shield in conjunction with it impossible.
This item can be stored in the Treasure chest of a Costume room, provided that the interface of the corresponding clue tier is opened before attempting to store the item. Alternatively, the item can be used on the opened treasure chest to insert it without viewing the interface.
Its examine text refers to Hattori Hanzō, a famous samurai and ninja of the Sengoku era in Japan. The text itself may be a reference to Kill Bill, in which his descendant who shares his name is a swordsmith.