Amazake Fermented Rice Drink

Japan (ancient origin, Nara period written records; revived as health drink in contemporary Japan)

Amazake (甘酒, 'sweet sake') is a thick, sweet, low- or zero-alcohol drink made from rice that has been fermented with koji mould (Aspergillus oryzae). It exists in two distinct forms. The traditional shio koji-style amazake is made by mixing cooked rice with rice koji and maintaining at approximately 55–60°C for 8–10 hours — the koji enzymes (amylases) break down the rice starch into glucose and maltose, producing natural sweetness without any added sugar. This version contains effectively zero alcohol. A second style is made from sake lees (sakekasu) dissolved in water with added sugar — this has a small residual alcohol content (1–3%). The rice-koji version is experiencing a major revival in Japan driven by health consciousness: it contains natural glucose, amino acids, B vitamins, and probiotics, and is sometimes called 'drinkable IV drip' (nōmukōya). Amazake is served warm in winter at shrine festivals and temple stalls (hinamatsuri, new year), cold in summer as a refreshing drink, and increasingly used as a natural sweetener in cooking to replace sugar. The flavour is mild, naturally sweet with a rice-grain sweetness, and slightly milky from the residual starch.

• Fermented rice drink sweetened by malt enzymes — same enzyme-driven starch-to-sugar conversion, different microorganism → Sikhye sweet rice punch Korean
• Rice fermented with mould/yeast starter producing sweet low-alcohol porridge-drink — direct structural parallel → Jiuniang sweet fermented rice wine Chinese
• Naturally fermented grain-based drink consumed for health properties; similar positioning as functional beverage → Blötmjölk fermented grain drink Scandinavian

Mildly sweet, slightly milky, clean rice grain sweetness; warm version comforting; cold version refreshing; no strong alcohol or acidity