Dassai Junmai Daiginjou 50 (720 ml)

In 1990, Hiroshi Sakurai made a decision that had no precedent in Japanese brewing: Asahi Shuzo would produce only Junmai Daiginjo — no futsushu, no honjozo, no seasonal hedging — staking the entire commercial range on sake's most demanding and expensive grade. The Dassai 50 is the foundation of that commitment. Brewed in Shuto-cho, Iwakuni City, Yamaguchi Prefecture, the brewery draws on Iwakuni's regionally classified soft mountain water — known locally as Seiryu (clear-stream water) — purified further on-site. Soft water produces a lighter, more delicate fermentation character, amplifying the floral lift that Yamada Nishiki rice delivers at this polish level. 100% Yamada Nishiki rice is polished to exactly 50% seimaibuai (half the grain milled away), washed in 10 kg batches in running water, soaked approximately 15 minutes, and fermented in small individual tanks with handmade koji applied manually — no automation at the koji stage. Rather than pressing under weight, Dassai pioneered commercial centrifuge separation (c. 2000), pulling sake from the mash without pressure to preserve the most volatile aromatic compounds intact. Pasteurization follows the brewery's patented Hayata method (Patent 2013-008455): bottled cold below 5°C, hot-water-shower pasteurized, then rapidly cooled — a technique commercialized in 2016 to lock in freshness that conventional heat-tunnel pasteurization destroys. The special feature here is structural: this is a brewery with no toji system, running permanent year-round staff and parallel fermentation teams who vary water absorption rates and temperatures batch-to-batch, treating each tank as a data point. Drink young to honor the Hayata-preserved aromatics.