Yamahoushi Junmai Bakurai Karakuchi Namagenshu

Yamahoushi Junmai Bakurai Karakuchi Namagenshu (山法師 純米爆雷辛口原酒生酒) belongs to the Yamabōshi series, a brand created as a limited-distribution line by the brewery established in 1972 through the merger of five local sake producers from the Kitamurayama area—Higashine, Murayama, Obanazawa, and Ōishida. Unlike the typically mellow character associated with the Yamabōshi range, this junmai has an exceptionally dry profile. Brewed using a special yeast and polished rice that retains a measured amount of umami, it boasts an unusually sharp and robust dryness.

The sake opens with a clean expression of rice flavour that spreads smoothly across the palate, followed by a strong, spicy edge. Its aroma and taste have hints of grapefruit, offering a crisp clarity and subtle depth. With an SMV of +28 on the sake meter scale, it is considered one of the driest sakes produced in Japan. This unpasteurised genshu (undiluted sake) combines freshness with intensity, balancing clarity and strength in a distinctive expression of the Yamabōshi brand.

Rokkasen Brewery (株式会社六歌仙), sometimes styled Michinoku Rokkasen, is situated in Higashine in Yamagata Prefecture, in a region flanked by the Ōu Mountains. The brewery draws its brewing water from springs located on Mount Kurofushi and uses locally grown rice from Yamagata Prefecture as its base ingredient. From its early days, Rokkasen adopted modern equipment to stabilise quality, while still emphasising hand-crafting and using human sensitivity in the brewing process. Its guiding principle is "pure fermentation" (純粋醗酵), aiming to harness the power of microorganisms naturally involved in sake production.

Rokkasen's origins date to 1972, when five local sake brewers in the Kitamurayama area joined forces to establish Yamagata Meijō Co., Ltd. (山形銘醸株式会社). In 1985, the brewing functions were reorganised into a cooperative body called Rokkasen Shuzō Kyōgyō Kumiai (六歌仙酒造協業組合). Then, in 1992, the company rebranded itself under the current name, Rokkasen Co., Ltd. (株式会社六歌仙).

The name "Rokkasen" evokes the rokkasen (六歌仙)—the six poets of classical waka poetry from the Heian period —as a symbolic aspiration for sake that resonates gently in people's hearts, much like poetry. Rokkasen continues to challenge the boundaries of sake by producing a diverse range of styles, from ultra-dry sake to sparkling varieties.

Rokkasen sources local ingredients, with nearly 98-99% of its rice from Yamagata Prefecture. The company collaborates closely with local farmers to cultivate rice suited explicitly for sake brewing. It also retains in-house rice polishing and precise temperature control across the brewing process. The brewery combines modern machinery and environmental controls with the sensibilities and intuition of its brewers, aiming to let nature's fermentation processes shine through in each bottle.

One of Rokkasen's signature innovations is Kiwamono, a blended sake series that revives traditional blending techniques, combining multiple base sakes to create a tailored style. Rokkasen also produces the "Yamabōshi Junmai Bakurai Karakuchi Genshu" (山法師 純米爆雷辛口原酒), which has gained attention as Japan's driest sake, rated +28 on the sake meter value.

Over the years, Rokkasen's sake has won recognition in domestic and international competitions, bolstering its reputation beyond Yamagata. Its product range now spans from everyday drinkers to more experimental and seasonal releases. Rokkasen also offers brewery tours and operates the "Rokkasen Club" (六歌仙倶楽部) on its premises, where visitors can enjoy tastings, purchase specialty bottles and local goods, and learn more about the brewery's philosophy and methodsIn summary, Rokkasen is a relatively young brewery—founded less than half a century ago—but one that leans heavily into craft, regional identity, and creative experimentation, drawing from both modern technology and traditional fermentation techniques in pursuit of expressive, clear sake.