For generations passed down wooden sword to Kutuna house. It has decorated with the Big Dipper in the blade. Possible to provide a sharpness such as seriously by wooden sword but but to clothe the "gas" of the user. Its power is steel even be bisected. However, the cry bonito from its appearance to the fan, also was that it was actually in Kezuribushi in coterie story. Turned, there even be that of Yui is referred to as a "bonito".