Yamahai Junmai Ginjo Aka Red (720 ml)

In 1946, Masumi's brewers isolated a yeast strain from their fermentation tanks in Suwa, Nagano, that would go on to power over 60% of Japan's sake industry — Kyokai Yeast No. 7. The Aka Red is built entirely on that lineage, fermented using the yamahai

yeast-starter method: natural lactic-acid bacteria cultivated in the shubo over approximately two weeks before fermentation begins, with no commercially added lactic acid.

The result is a structural complexity that sokujo-method ginjo simply cannot replicate.

The Suwa Basin kura sits where the ancient Koshu Kaido road meets the Kirigamine Highlands approach — a site historically called Shimizu-machi, 'Clear Water Village.' Water drawn from the Yatsugatake (Eight Peaks) Range snowmelt is soft and mineral-clean, tempering the yamahai's natural acidity into something precise rather than aggressive.

Cold mountain air and Nagano's short, sharp winters slow fermentation and concentrate aromatic development.

Rice is Miyama Nishiki, polished to ginjo grade (≤60% remaining), milled in-house at Masumi's own polishing plant. Fermentation proceeds through three-stage sandan-jikomi addition in temperature-controlled tanks. The special feature here: yamahai is almost

universally reserved for junmai or premium tiers at other breweries — Masumi applies it across the entire range, making this mid-tier ginjo as labour-intensive to produce as most breweries' flagship expressions.

Drink now through 2–3 years from bottling; the lactic backbone rewards light chilling rather than full refrigeration.