Hakuyo is the flagship brand of Otani Chukichi Honten, a brewery founded in 1879 in Shirakawa, Fukushima Prefecture, a city known for its crisp winters and clean spring water. The brewery focuses on aromatic, rich styles of junmai and junmai ginjo sake, crafted from locally sourced ingredients with an emphasis on traditional methods. Shirakawa's location in southern Fukushima, where cold air descends from the Nasu Highlands, provides ideal slow-fermentation conditions that are central to the Hakuyo house character.