Solid kendama with excellent fit and finish, the discontinued Mugen Kotobuki was an odd bird. It was a clone of the JKA certified Mugen series with gold sparkles embeded in the paint, sold in a cardboard box rather than in a plastic bag. These were not JKA certified, and have no JKA seal, although they are identical to the Mugens in every material respect.

There were two colors of Kotobuki. This is the Mugen Kotobuki in red.