Authentic Awamori "Rock Boy" Rare Kaminari Edition - Discontinued - Over 35 Years Old Unopened. Manufacturer: Mizuho Shuzo Co., Ltd. Product Name: Rock Boy Alcohol Content: 30% Volume: 720ml Rock Boy was sold for about 5 years in the 1980s. Also, The area code on the label is (0988), a 4-digit number. Naha City's area code changed to (098), a 3-digit number, in 1990. This product is from before 1990. It is a discontinued and rare item, at least over 35 years old. There are no cracks in the bottle, but the label has damage due to aging.