Toshikazu Kawasaki

Toshikazu Kawasaki was a Japanese paperfolder and origami theorist, born in Kurume, Fukuoka in 1955, known for geometrically innovative models, especially a series of fourfold symmetry roses built on a twisting maneuver. He developed the technique of iso-area folding, in which each side of the paper shows in equal amounts, and he discovered and proved that around any flat-folded vertex the alternating angles sum to 180 degrees, a result now called Kawasaki theorem. He also taught mathematics at Sasebo Technical Junior College and published books including Origami^6 and The Greatest Dream Origami. He died in 2026.