Tsunan Brewery is a Niigata-based sake maker founded by local farmers, JA, and the town of Tsunan to protect and sustain its premium Gohyakumangoku rice. Set in a snowy landscape shaped by ancient river terraces, it uses soft spring water from melted snow to produce clean, refined sake that reflects the character of its environment. The brewery follows a traditional three-stage brewing method with slow maturation, creating elegant, food-friendly sake that is light, balanced, and crisp. It has earned numerous awards, including gold medals at the National New Sake Competition, the International Wine Challenge, and the London Sake Challenge. Tsunan Sake Brewery in Sustainable Snow Country. The brand name "Go" has various meanings. Tsunan Town and its neighboring cities are collectively called “Tsumari-go“ This brewery is located , which has been selected as one of the 100 most unexplored region, "Akiyama Go” And “故郷-hometown-” Changing "郷" to "GO" makes it easier for people overseas to read, and also conveys a positive feeling of "Let's go, let's do it!"

Tsunan Brewery, is located in Niigata’s fertile Echigo Plain, bordered by the Agano River and the Gozu mountain range. This region is renowned for producing premium Koshihikari rice, along with other quality crops like eggplant and edamame. Its heavy snowfall, strong river winds, and clean natural environment create ideal conditions for sake brewing, influencing both the flavor and quality of the sake produced. In Agano-shi and across Niigata Prefecture, eco-friendly cultivation is deeply valued, especially in rice farming. Growers increasingly embrace sustainable methods, including organic practices, reduced chemical use, and natural pest control, to protect the region’s pristine environment. For breweries like Koshitsukano, which rely on the purity of local rice and spring water, these practices are essential. Every step, from careful rice cultivation to traditional brewing, reflects a deep respect for nature, ensuring that the land, water, and ecosystems remain healthy for generations to come.