Wataru Hatano 'The Accumulation of Time' 3Handmade in Japan. Details Origin Dimensions: W 65 cm x H 90 cm Materials: Washi Paper Method: Wataru Hatano's work is made from the Kurotani washi, a traditional Japanese paper. Washi is hand made by first separating the inner bark of the plant and pounding it. This pounded version of the Kozo inner bark is added to a liquid solution and mixed with tororo aoi (fermented hibiscus root), resulting in a paste like substance. Each sheet of paper is made