Tokkyu-shu (special-grade sake)
特級酒とくきゅうしゅTokkyu-shu (特級酒, "special-grade sake") was one of the tax classifications once applied to sake and whiskey in Japan, and it served as one indicator of sake quality. Under this system, sake was divided into special grade (tokkyu), first grade (ikkyu), and second grade (nikyu), and each grade was taxed at a different rate. However, with a revision of the Liquor Tax Act, this grading system was abolished from April 1, 1990 (Heisei 2)...