Rooted in the land of Aomori — a richly flavored brand pork born from a naturally regenerative, circular farming system.
Hasegawa no Shizen Jukusei Ton (Hasegawa’s Naturally Matured Pork) is a distinctly individual brand pork produced by Hasegawa Natural Ranch Co., Ltd. based in Ajigasawa Town, Nishi-Tsugaru District, Aomori Prefecture — born of natural circular agriculture deeply rooted in the Tsugaru land and a unique rearing philosophy. While pigs are typically shipped at around six months of age, this ranch raises them slowly to 300 days of age (approximately 10 months). This extended rearing allows fine marbling to develop throughout the lean, accumulates sweetness and a rich, mellow fragrance in the fat, and produces a meat quality that delivers the full depth and umami of pork as it was traditionally known. The feed is a proprietary blend based on locally-grown vegetables and potatoes raised without pesticides or chemical fertilizers, combined with breadcrumbs from local factories and rice bran — with fermentation bacteria, charcoal, and wood vinegar added for a unique formulation. The barns are spread with carbonized rice husk to maintain a clean rearing environment, and no hormones or antibiotics are used whatsoever. Pig manure is returned as compost to grow vegetables and pasture, whose produce is then fed back to the pigs — a natural cycle practiced throughout the entire farm. Farm staff even speak to the pigs each morning as a measure to reduce stress, and pigs raised freely in this calm environment yield a richly characterful meat quality. In simple preparations such as ginger pork stir-fry, the authentic umami of the ingredient and the sweetness of the fat can be savored to the full. The sincere pursuit of food safety and reliability at Hasegawa Natural Ranch has attracted attention as a model for regional agriculture, earning deep trust from many consumers.
Basic Information
- Name
Hasegawa no Shizen Jukusei Ton - Production Area
Ajigasawa Town, Nishitsugaru District, Aomori - Management Body
Hasegawa Natural Farm Co., Ltd. - Breed / Crossbreeding
Female (Landrace Female × Large White Male) × Male Duroc - Meat Characteristics
Long-term rearing to 300 days develops fine marbling in the lean, with sweet, richly aromatic fat — delivering deep, old-fashioned pork richness of a bygone era. - Feed Characteristics
Proprietary blend of locally grown pesticide-free vegetables, potatoes, bread offcuts, and rice bran, plus fermentation bacteria, charcoal, and wood vinegar. No hormones or antibiotics. - Shipping Age
300 days - Annual Production
800–960 head/year - Signature Dish
Ginger pork (shogayaki) - Certifications
Trademark registered (October 25, 2013)
Farm HACCP application pending - Related URLs
One Story Media – Hasegawa Natural Farm Feature
Hasegawa Natural Farm
Pork Tasting Set (Aomori Sanchi)
Marugoto Aomori – Farm Feature Article - Source
Brand Pork Guidebook 2026 p.30
One Story Media
Hasegawa Natural Farm
Aomori Sanchi
Marugoto Aomori
Last updated
June 19, 2026