Koshitanrei: Niigata's Next Generation

## The Best of Both Parents

Koshitanrei (越淡麗) is Niigata's answer to a simple question: what if a sake rice could combine {{glossary:yamada-nishiki}}'s polishing ability with {{glossary:gohyakumangoku}}'s cold tolerance? Fifteen years of breeding work produced this ambitious crossbreed, registered in 2004.

## The Breeding Challenge

Niigata's prefectural brewing research institute crossed Yamada Nishiki with Gohyakumangoku, then selected through many generations for the desired combination of traits. The result was a variety with a larger, better-defined shinpaku than Gohyakumangoku and better cold tolerance than Yamada Nishiki.

## Overcoming Gohyakumangoku's Limit

One of the primary motivations was to create a Niigata-grown rice that could be polished below 50% for premium {{glossary:daiginjo}} production. Gohyakumangoku tends to crack at extreme polishing ratios, forcing Niigata brewers to import Yamada Nishiki for their top bottlings. Koshitanrei solves this problem.

## Flavor Character

Sake from Koshitanrei shows a refined, elegant character with clean lines and gentle aromatics. It sits between Yamada Nishiki's structured elegance and Gohyakumangoku's crisp simplicity. The style is distinctly Niigata — clean, precise, and balanced.

## Premium Positioning

Koshitanrei is positioned as Niigata's premium rice for top-tier sake. Breweries use it for their flagship daiginjo and competition entries where a specifically Niigata identity is desired. The rice allows Niigata to produce world-class daiginjo from entirely local ingredients.

## A Blueprint for the Future

Koshitanrei represents a model that other prefectures are following — investing in custom-bred sake rice that expresses regional identity while matching the quality of established national varieties. This trend toward purpose-bred regional rice is reshaping the sake landscape.