Katsuhiko Okamoto

Katsuhiko Okamoto is a Japanese inventor who specializes in modifications of the Rubik's Cube. Since 2001 he has created 31 such puzzles.

Katsuhiko Okamoto

Katsuhiko Okamoto is a Japanese inventor who specializes in modifications of the Rubik's Cube. Since 2001 he has created 31 such puzzles.