Kendo Study - Katana Grip vs Shinai Grip

source https://www.youtube.com/watch?v=QLGyR8Ubky8

"Basically the same. But I think it is slightly different. Well, more precisely, these grips should be different, don't you think? Simply, different weapons, different purposes so they should be different. But there are things we should keep in mind.

Let's see how kendoists should grab (hold) a shinai. "