Piggy Tsujioka is a versatile crafter who has co-authored books on papercraft, leathercraft and more. She specializes in dyeing, design, illustration, and stenciling. Along with Yoko Ganaha, she is the driving force behind Pigpong, a creator of books on various crafts.
Hisako Rokkaku is an eco-weaver who specializes in working with scrap fabrics and creating looms from cardboard, plastic bottles, and other repurposed goods.
Seiwa is a Japanese manufacturer of dyes and leather crafting materials. Established in 1945, they have held classes in dyeing and leather craft since the 1950s.