The Japanese paper (washi) maker ONAO, located in Ichikawamisato, Yamanashi an area boasting a washi-making history spanning 1000 years - and industrial designer Naoto Fukasawa have teamed together to create the SIWA series. Fukasawa discerned that the special texture of Naoron, a paper developed by ONAO that doesn't tear easily, emerged when the paper was crumpled, and suggested designer for everyday goods that harnessed this. The name SIWA is both a reversing of the characters in the word washi, and a word meaning, "crinkle" in Japanese. As with leather goods, these washi products are lovingly individually crafted.

Profile of materials

Soft Naoron
Soft Naoron is a paper developed by ONAO company from wood pulp and polyolefin utilizing the washi-suki paper manufacturing method. it is soft and flexible, highly water-resistant and does not tear easily. Soft Naoron does not emit noxious fumes when burned.

RPF Naoron
RPF Naoron (Recycled PET Fiber Naoron) is a paper created using the washi-suki paper manufacturing method from recycle polyester fibers from used plastic bottles and textile products. While having the distinctive texture of paper, it does not tear easily and is highly water-resistant. RPF Naoron does not emit noxious fumes when burned.

Heavy items can be placed inside. Has been tested for loads of up to 10kg. (Testing conducted by QTEC Household Goods Testing Center) (Changes may occur to load capability depending on how the product is used and with time).

Even wet item such as umbrellas can be put inside without fear of it tearing. (Please note that leaving wet items inside for long periods of time may result in changes in the color of the product).