Japanese Paper Washi Umbrella 'Iko'Japanese Paper Washi Umbrella 'Iko' Traditional Washi Inspired Wagasa Washi traditional Japanese handmade paper has been crafted since the 7th century from the inner bark of native plants like kozo (mulberry), mitsumata, and gampi. Used for everything from Buddhist sutras to shoji screens to the canopy of traditional wagasa umbrellas, washi is among Japan's most refined craft materials. The best washi makers still work in regional centers like Mino