GO GRANDCLASS Uonuma Koshihikari Edition

Uonuma Koshihikari, the rice people eat, made into junmai daiginjo. Slowly fermented at low temperature in a brewery wrapped in snow, for a clean, clear taste.

Taste

Uonuma Koshihikari polished to 50% is fermented slowly at low temperature. The cold of the snow-covered brewery helps give a clean, clear taste with few off-flavors, and the sweetness of Koshihikari comes through.

Specifications

Type

Junmai daiginjo

Rice

100% Uonuma Koshihikari (table rice, not sake rice)

Polishing ratio

50%

Alcohol

15%

Volume

720ml

Method

"Smart Brewing" with generative AI, combined with the brewer's judgment, to design a slow, low-temperature fermentation

Presentation

Paulownia-wood box with a serial-numbered wooden tag (limited quantity)

Brewer

TSUNAN SAKE BREWERY (Tsunan, Niigata, Japan)

Specification sources: official Koshihikari edition site · PR TIMES, 24 October 2026 (in Japanese). Please check the official online store (in Japanese) for availability.

How to enjoy it

• With food. With Japanese courses, sushi and other dishes that let rice speak. In January 2026 it was served in the US with the course at Nodoguro in Portland and with sushi at Shiku Sushi in Seattle.
• As a gift. A paulownia-wood box and a serial-numbered wooden tag, for anniversaries and thank-yous.

More scenes are on the pairings page.

Awards for this sake

• Organizer's listKura Master 2024 Gold Award — Junmai Daiginjo category (France). Brewery notice: tsunan-sake.com
• Brewery releaseMilano Sake Challenge 2025 Platinum (Italy)

Awards won by the brewery's other sakes, such as the Niigata Governor's Award for the "Tsunan" label, are not awards for this sake. See Awards for the brewery's full list.

The flagship of Premium Table Rice Sake

GO GRANDCLASS shows that a junmai daiginjo recognized at international competitions can be brewed from 100% Uonuma Koshihikari, rice grown for eating. It is one concrete example of the Premium Table Rice Sake category proposed by TSUNAN SAKE BREWERY. For an easier way in, try GO UONUMA SPARKLING, brewed from the same rice.

For restaurants, hotels, retailers and importers

For distribution, trade orders and overseas sales, please contact the brewery.
TSUNAN SAKE BREWERY · +81-25-765-5252 · tsunan-sake.com