Hirokazu Iwasawa

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  Square in the Bag - Dragonfly (Hirokazu Iwasawa)

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  CorRECTly in the Bag - Dragonfly (Hirokazu Iwasawa)

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  Square in the Bag - Small Cherry Blossom (Hirokazu Iwasawa)

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  CorRECTly in the Bag - Small Cherry Blossom (Hirokazu Iwasawa)

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  Square in the Bag - Hemp Leaf (Hirokazu Iwasawa)

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  CorRECTly in the Bag - Hemp Leaf (Hirokazu Iwasawa)

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  Square in the Bag - Sayagata (Hirokazu Iwasawa)

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  CorRECTly in the Bag - Small Cherry Blossom (Hirokazu Iwasawa)

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  Correctly in the Bag - Plastic (Iwahiro)

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  MMM Original (Hirokazu Iwasawa / Iwahiro)

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  MMMM (Iwahiro / Brian Menold)

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  Original ODD puzzle (Iwahiro)

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  Hexahedroom (Iwahiro)

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  Cubes in Space (Hirokazu Iwasawa)

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  Cubes in Space - Transparent version (Hirokazu Iwasawa)

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  Gem Box (Hirokazu Iwasawa)

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  Dango Box (Hirokazu Iwasawa)

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  Dango Box 3463 (Hirokazu Iwasawa)

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  10 Ball Pyramid Puzzle Twinquint (Hirokazu Iwasawa / Iwahiro)

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  Twenty Ball Pyramid Puzzle Quartet (Hirokazu Iwasawa / Iwahiro)

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  Single Knot (Hirokazu Iwasawa)

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  All Edges Coverage (Iwahiro)

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  Hexangular Jam - Original (Iwahiro)

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  Rectangular Jam - Original (Iwahiro)

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  Rightangular Jam - Original (Iwahiro)

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  5 Yen in a Jam - Original (Iwahiro)

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  Pentangular Jam (Hirokazu Iwasawa)

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  Triangular Jam - Original (Iwahiro)

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  Hexangular Jam - Plastic (Iwahiro)

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  Pentangular Jam - Plastic (Iwahiro)

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  Triangular Jam - Plastic (Iwahiro)

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  Rectangular Jam - Plastic (Iwahiro)

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  AlCyl (Iwahiro)

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  Zipper (Iwahiro)

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  Trilaton (Iwahiro)

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  Tangled Gym Bird Cage (Hirokazu Iwasawa - Iwahiro)

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  Dinghy (Hirokazu Iwasawa - Iwahiro)

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  Aroma (Iwahiro)

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  Crystalline (Hirokazu Iwasawa)

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  Aroma Transparent (Hirokazu Iwasawa)

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  Cube Wrapper (Hirokazu Iwasawa)

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  Checkablock (Hirokazu Iwasawa)

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  4-Identical-Piece Cube #1 - Solved (Hirokazu Iwasawa)

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  4-Identical-Piece Cube #1 (Hirokazu Iwasawa)

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  4-Identical-Piece Cube #2 - Solved (Hirokazu Iwasawa)

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  4-Identical-Piece Cube #2 (Hirokazu Iwasawa)

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  8-Identical-Piece Cube - Solved (Hirokazu Iwasawa)

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  Apparently Impossible Cube - Solved (Hirokazu Iwasawa)

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  Apparently Impossible Cube #1 (Hirokazu Iwasawa)

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  8-Identical-Piece Cube (Hirokazu Iwasawa)

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  Caged Pyramid (Hirokazu Iwasawa)

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  Bus Jam (Hirokazu Iwasawa)

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  Gears (Hirokazu Iwasawa)

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  Record (Hirokazu Iwasawa)

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  Chipped Square (Hirokazu Iwasawa)

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  Hole for the Crystal (Hirokazu Iwasawa)

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  Hole for the Pyramid (Hirokazu Iwasawa)