Minamiuonuma Koshihikari is a Japanese short-grain white rice grown by the family-run farm Matsuendon in Minamiuonuma, Niigata Prefecture. The paddies are irrigated with snowmelt from the surrounding mountains.

During cultivation, the farm uses rice bran and molasses to feed soil microorganisms. After harvest, the rice is stored in a temperature- and humidity-controlled warehouse. For orders placed through Tsunagi, the rice is polished just before shipping.

Once cooked, the grains are glossy, mildly sweet, and soft and sticky. The rice can be served plain or shaped into onigiri, Japanese rice balls.