Oleic acid measured and certified in every individual animal — a premium brand pork that Nagano is proud to guarantee.
Shinshu Olein Ton (Shinshu Oleic Acid Pork) is a brand pork managed and operated by Nagano Ken 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 barley 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 Yorkshire 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
Designated farms in Nagano Prefecture (including Tateshina area) - Management Body
Nagano Agricultural Cooperative Direct Sales Co., Ltd. (Nagachoku) - Breed / Crossbreeding
Three-breed cross: Female (Landrace x Large White) x Male Duroc - Meat Characteristics
Quantitatively verified oleic acid content of 45%+ per individual pig; soft, smooth melting fat with mild sweetness and excellent freshness retention - Feed Characteristics
Original blend of corn, milo, wheat, and Shinshu-grown brown rice; formulated specifically to shift the fatty acid profile toward oleic acid - Shipping Age
Not specified - Annual Production
Approx. 3,000 head annually - Signature Dish
N/A - Certifications
Trademark registration: April 5, 2013
Brand regulations established: April 5, 2013
Farm HACCP: not applicable
JGAP: not applicable - Related URLs
Nagano Agri-Coop Direct Sales – Shinshu Olein Pork
Shinshu Olein Ton Association
Buta Trace – Nagano Agri-Coop Tateshina Farm - Source
Branded Pork Guidebook 2026, p.118
Nagano Agri-Coop Direct Sales – Shinshu Olein Pork
Shinshu Olein Ton Association
Buta Trace – Nagano Agri-Coop Tateshina Farm
Last updated
6/21/2026