Koshihikari
コシヒカリ
Japan's most-produced rice cultivar, accounting for roughly one-third of national paddy acreage. Widely grown across Niigata, Fukushima, Ibaraki, Tochigi, and Yamagata, it features strong stickiness, sweetness, and luster. The flavor holds up even when cooled, making it ideal for home cooking, sushi, and onigiri.
About Koshihikari
Japan's #1 cultivar by acreage, with Uonuma-grown Koshihikari standing as the premium benchmark. Strong stickiness and sweetness keep flavor intact in onigiri, sushi, and cooled bento.
Taste & Texture
Medium-sized translucent grains with strong cooked-rice luster. Stickiness comes from low amylose content, and chewing brings out sweet flavor. Holds moisture well after cooling, suiting onigiri and sushi. As a soft variety, it requires care when absorbing sushi vinegar.
Season
PEAK
Sep – Oct
Top Production Areas
Variety Comparison
vs. Akitakomachi
Koshihikari has stronger stickiness and sweetness with a richer mouthfeel; Akitakomachi has more distinct grains, better suited for bento and sushi.
vs. Yumepirika
Yumepirika is a newer Hokkaido brand with stickiness and sweetness comparable to Koshihikari, with better cold-region tolerance.
Breeding History
Crossbreeding began in 1944 at the Niigata Agricultural Experiment Station, with Fukui completing varietal stabilization. Originally called "Echizen 17," it was officially registered as Koshihikari in 1956 — a name meaning "shining light of the land of Koshi." Despite early adoption challenges (susceptibility to blast disease and lodging), its flavor pushed it to #1 by acreage in 1979, where it has remained ever since.
- Breeder
- Niigata & Fukui Agricultural Experiment Stations
- Parentage
- Norin 22 × Norin 1
- Registered
- 1956
Source: Official registry / Breeder / brand council publication
How to Choose
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Choose bags with a recent milling date.
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"Single-source Koshihikari" (単一原料米) labels guarantee a single cultivar, origin, and crop year.
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Prices vary by origin — Uonuma > general Niigata > other prefectures — so match origin to budget and use.
How to Store
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Avoid heat, humidity, and direct sunlight; store in an airtight container in the refrigerator vegetable drawer.
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Use within 1 month of milling (2 weeks in summer) for peak flavor.
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Newly harvested rice has high moisture — reduce cooking water by ~10%.
Frequently Asked Questions
What's the difference between Uonuma Koshihikari and regular Koshihikari?
Same cultivar, but the Uonuma region's large day-night temperature swings, abundant snowmelt water, and excellent soil produce noticeably stronger stickiness, sweetness, and aroma. It commands 2–3× the market price of other regions.
How much rice acreage is Koshihikari?
According to the Ministry of Agriculture's cultivar acreage data, Koshihikari has long held about one-third (~33%) of national paddy acreage — the top position by a wide margin.
Is Koshihikari good for sushi?
Edomae sushi chefs sometimes find Koshihikari's strong stickiness a bit heavy for sushi rice; many prefer Sasanishiki or Akitakomachi for less sticky shari. For home-made sushi or chirashi, it works perfectly well.