Diamond Pork

A diamond shining with the whiteness of its fat — the treasure of pure Yorkshire that Chiba is proud of.

Diamond Pork is a Japanese brand pork (meigara-buta) from Tomisato City, Katori City and others, Chiba Prefecture, managed by Chiba York Research Association. Breed / crossbreeding: Middle Yorkshire (purebred).

Diamond Pork is a Chiba Prefecture brand pork maintaining the pure Middle Yorkshire breed — its greatest appeal, as its name suggests, is the brilliantly white fat shining like a jewel. The Middle Yorkshire breed, widely raised in Chiba Prefecture in the Showa 30s (1955–1964), has been revived for the modern era, and through careful rearing on a proprietary compound feed, the rich flavor that Japanese pork once possessed is conveyed to the present day.

Unlike the common three-breed cross, the finely grained meat quality unique to a pure breed produces a moist mouth feel. The fat is white with transparency — when it enters the mouth, an elegant sweetness and richness spread gently. Not merely soft — the deep umami felt with every chew is a defining characteristic — the appeal stands out most clearly in simple preparations that draw out the quality of the ingredient.

Management is handled by the Chiba York Research Association, with production at 3 farms in Sosa City, Katori City, and Tomisato City. Shipping is at 230–240 days of age, body weight approximately 120 kg — raised more slowly than standard pigs. With slow growth and fewer piglets, annual shipments are approximately 1,000 head — a brand pork of high rarity value. Slaughter is carried out at Chiba Prefecture Meat Corporation, with distribution handled by Toso Meat Center.

In shabu-shabu and sukiyaki, the sweet umami of the clear fat melts into the soup and broth for a truly exceptional dish. A specialty that can also be confidently recommended in preparations where the flavor of the pork itself is tested — such as tonkatsu and salt-grilling. When you encounter it at specialty meat shops or premium department store meat counters within Chiba Prefecture, please do pick it up.

Basic Information

• Name
  Diamond Pork
• Production Area
  Tomisato City, Katori City and others, Chiba Prefecture
• Management Body
  Chiba York Research Association
• Breed / Crossbreeding
  Middle Yorkshire (purebred)
• Meat Characteristics
  Fine-grained meat unique to the pure Middle Yorkshire breed. Fat shines white like a jewel; rich umami and elegant sweetness
• Feed Characteristics
  Original compound feed given
• Shipping Age
  230–240 days
• Annual Production
  Approx. 1,000 head annually (rare). Primary wholesaler: Toso Meat Center.
• Signature Dish
  Shabu-shabu, sukiyaki, tonkatsu, salt-grilled
• Certifications
  Brand regulations established: November 5, 2004 (revised June 29, 2017)
• Related URLs
  Diamond Pork | Chibaza Pork
  Buta Trace – Farm Traceability Detail
• Source
  Branded Pork Guidebook 2026, p.98
  Chibaza Pork
  Buta Trace Pig Traceability System

Last updated
6/21/2026