(Tokyo). 1981;27(6):563-72. Hosking, Richard. A dictionary of Japanese food: ingredients & culture. Tuttle Publishing. 2004. Page 234 to 235. Okada Sugar Manufacture. Retrieved September 2010 from http://www.wasanbon.co.jp/wasanbon/index_eng.html Tokushima Prefecture Shikoku region Sugars Wagashi