Square in the Bag - Dragonfly (Hirokazu Iwasawa)
CorRECTly in the Bag - Dragonfly (Hirokazu Iwasawa)
Square in the Bag - Small Cherry Blossom (Hirokazu Iwasawa)
CorRECTly in the Bag - Small Cherry Blossom (Hirokazu Iwasawa)
Square in the Bag - Hemp Leaf (Hirokazu Iwasawa)
CorRECTly in the Bag - Hemp Leaf (Hirokazu Iwasawa)
Square in the Bag - Sayagata (Hirokazu Iwasawa)
CorRECTly in the Bag - Small Cherry Blossom (Hirokazu Iwasawa)
Correctly in the Bag - Plastic (Iwahiro)
MMM Original (Hirokazu Iwasawa / Iwahiro)
MMMM (Iwahiro / Brian Menold)
Original ODD puzzle (Iwahiro)
Hexahedroom (Iwahiro)
Cubes in Space (Hirokazu Iwasawa)
Cubes in Space - Transparent version (Hirokazu Iwasawa)
Gem Box (Hirokazu Iwasawa)
Dango Box (Hirokazu Iwasawa)
Dango Box 3463 (Hirokazu Iwasawa)
10 Ball Pyramid Puzzle Twinquint (Hirokazu Iwasawa / Iwahiro)
Twenty Ball Pyramid Puzzle Quartet (Hirokazu Iwasawa / Iwahiro)
Single Knot (Hirokazu Iwasawa)
All Edges Coverage (Iwahiro)
Hexangular Jam - Original (Iwahiro)
Rectangular Jam - Original (Iwahiro)
Rightangular Jam - Original (Iwahiro)
5 Yen in a Jam - Original (Iwahiro)
Pentangular Jam (Hirokazu Iwasawa)
Triangular Jam - Original (Iwahiro)
Hexangular Jam - Plastic (Iwahiro)
Pentangular Jam - Plastic (Iwahiro)
Triangular Jam - Plastic (Iwahiro)
Rectangular Jam - Plastic (Iwahiro)
AlCyl (Iwahiro)
Zipper (Iwahiro)
Trilaton (Iwahiro)
Tangled Gym Bird Cage (Hirokazu Iwasawa - Iwahiro)
Dinghy (Hirokazu Iwasawa - Iwahiro)
Aroma (Iwahiro)
Crystalline (Hirokazu Iwasawa)
Aroma Transparent (Hirokazu Iwasawa)
Cube Wrapper (Hirokazu Iwasawa)
Checkablock (Hirokazu Iwasawa)
4-Identical-Piece Cube #1 - Solved (Hirokazu Iwasawa)
4-Identical-Piece Cube #1 (Hirokazu Iwasawa)
4-Identical-Piece Cube #2 - Solved (Hirokazu Iwasawa)
4-Identical-Piece Cube #2 (Hirokazu Iwasawa)
8-Identical-Piece Cube - Solved (Hirokazu Iwasawa)
Apparently Impossible Cube - Solved (Hirokazu Iwasawa)
Apparently Impossible Cube #1 (Hirokazu Iwasawa)
8-Identical-Piece Cube (Hirokazu Iwasawa)
Caged Pyramid (Hirokazu Iwasawa)
Bus Jam (Hirokazu Iwasawa)
Gears (Hirokazu Iwasawa)