Hajime Katsumoto

4 Suits
4-PAC
5L Box
Black Box for Tetrominoes
Bracket Holes
Circlink
Eccentric Pentominoes
L12 Burr
Midi
Packing Puzzle 4P
Penta in a Box
Quarter Turn Hole
Slide Packing
Squared Squares
Tetromino Case V01MU
Tetromino Case V03HK
Tri-Trapeze
Turning Quarter Hole