Good quality rice and clear water are essential for brewing delicious sake. On Sado Island, the rice used in sake brewing is locally-grown with minimal use of agricultural chemicals and pesticides. Rice for sake is grown mainly in the Kuninaka Plain, an area that originally formed by reclaiming the sea with soil and sand sediment from the Osado mountains and Kosado hills. The fertile soil of the plains has been formed by several rivers, and many wild plants grow in these rich fertile wetlands. The water used for brewing sake is clear, soft groundwater collected from the mountains. Long ago, the deep sea floor rose more than 3,000 meters to form a large mountain range. Every year as the mountain snow melts, it seeps into the ground. After several decades pass, this water gushes out as subsoil water. This mountain subsoil water provides clean water suitable for sake brewing.

The sake of Sado Island, made from high-quality rice and clear water, is characterized by its light, dry, and refreshing taste. Many unique sake breweries can be found on Sado Island and are gaining popularity both domestically and internationally.