Kenjutsu is the body of martial arts techniques in Japan using the classical Katana. Um, and there are various different time periods that schools going all the way back to the warring states period all the way up to the Meiji period and certain schools have different styles of cutting. They use different types of dimensions of blades uh they have different philosophical characteristics. Um, so there's quite a variety um but pretty much Kenjutsu involves any any martial arts school that's focusing and specializing on the use of the Katana in it's array of techniques. And that is Kenjutsu.