Oleic acid measured and certified in every individual animal — a fine-quality brand pork that is the pride of Nagano.
Shinshu Olein Ton is a Japanese brand pork (meigara-buta) from Nagano Prefecture, managed by Naganoken Nokyo Chokuhan Co., Ltd. Breed / crossbreeding: Female (Landrace × Large White) × Duroc (three-breed cross).
Shinshu Olein Ton (Shinshu Oleic Acid Pork) is a brand pork managed and operated by Naganoken Nokyo Chokuhan Co., Ltd. in Nagano Prefecture. Its defining feature is that the content rate of ‘oleic acid’ — a monounsaturated fatty acid contained in pork fat — is confirmed individually with a dedicated measuring device, and only individuals that clear the self-imposed standard (45% or more) are permitted to bear the brand name. This initiative of proving quality numerically is widely evaluated as an advanced undertaking even within Japan — providing a reliable basis for consumers to purchase with confidence.
For the feed, an original blend is adopted — corn, milo, and cereal grains such as barley and wheat as the primary ingredients with Shinshu-grown brown rice added. By ingesting well-balanced, rich grain-derived nutrition, the pig’s oleic acid value naturally rises — the fat’s melting point lowers, producing a smooth melt-in-the-mouth feel. When prepared as shabu-shabu or tonkatsu, the non-cloying, clean sweetness of the fat stands out with every bite. Popular not only for home cooking but also as a gift.
The breed is a three-breed cross — Landrace × Large White female crossed with Duroc male — raised slowly over approximately 200 days. A certificate noting the production farm, identification number, and oleic acid measured value is issued for each shipped pig — the peace of mind of being able to trace production area information all the way to the table is also a major appeal. Annual shipments are limited to approximately 3,000 head — a brand of high rarity value.
Please do enjoy the rich flavor in preparations such as braised pork belly and pork sauté that fully draw out the umami of the fat.
Basic Information
- Name
Shinshu Olein Ton - Production Area
Nagano Prefecture (designated farms within the prefecture) - Management Body
Naganoken Nokyo Chokuhan Co., Ltd. (Nagachoku) - Breed / Crossbreeding
Female (Landrace × Large White) × Duroc (three-breed cross) - Meat Characteristics
Oleic acid content of 45% or more measured and certified for each individual. Fat with a low melting point and a smooth melt-in-the-mouth quality; rich in sweetness and depth - Feed Characteristics
Original feed blended at a contracted feed mill, based on corn, milo, and cereal grains, with Shinshu-grown brown rice added - Shipping Age
Approx. 200 days - Annual Production
Approx. 3,000 head annually - Signature Dish
Shabu-shabu, tonkatsu, braised pork belly (kakuni), pork sauté, yakiniku - Certifications
Trademark registered: April 5, 2013 / Brand regulations established: April 5, 2013 / Farm HACCP: none / JGAP: none - Related URLs
Naganoken Nokyo Chokuhan – Shinshu Olein Ton
Shinshu Olein Ton Association
Buta Trace – Naganoken Nokyo Chokuhan Tateshina Farm - Source
Branded Pork Guidebook 2026, p.118
Naganoken Nokyo Chokuhan – Shinshu Olein Ton
Shinshu Olein Ton Association
Buta Trace – Naganoken Nokyo Chokuhan Tateshina Farm
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Last updated
6/21/2026
