The secret to their success are as follows; their well water comes from the Asahi mountain range of Niigata and Yamagata, areas famous for snowfall and largely fluctuating temperatures. The air and water are also filtered by the voluminous forests of the area. Additionally, their rice is known as the top quality in the region - mostly they use “Gohyakumangoku”, and sometimes the recently developed “Koshi Tanrei Rice”. For their “Daiginjo” sake, they use “Yamadanishiki” from Hyogo.
