Nechiotokoyama is produced by Watanabe Sake Brewery, founded in 1868 in Itoigawa City, Niigata Prefecture, in a mountain valley called Nechi, and is one of Japan's most prominent practitioners of the domaine-style approach to sake making. Since 2003, the brewery has cultivated its own fields, growing only two rice varieties developed in Niigata, Gohyakumangoku and Koshitanrei, with the goal of using 100% self-grown rice. The brewery also produces a vintage-labeled line called Nechi, which releases each year's harvest as individual bottlings without filtering out the character of that season's crop.
