Koikawa Brewery is located in the birthplace of the legendary Kamenoo rice. The brewery is committed to using locally grown rice and other ingredients from Yamagata Prefecture to craft sake that reflects its regional roots. It takes pride in the concept of junmai kanzake—pure rice sake that reveals its full character when warmed. Using only rice, rice koji, and water, Koikawa continues to brew junmai sake that is enjoyable both warm and chilled. Its signature style is well-aged junmai sake that highlights the natural richness of rice while maintaining a clean, dry finish—making it a perfect match for a wide range of dishes.