Raised on a feed blending six grains — wheat, barley, rice and more — a premium brand pork born of Gunma Prefecture.
Joshu Rokkokuton (Joshu Six-Grain Pork) is a brand pork produced by I-Pork Co., Ltd., based in Maebashi City, Gunma Prefecture. As the name suggests, an original designated feed balanced with 6 varieties of grain — wheat, barley, rice, corn, milo (sorghum), and soybean — is used, and of the Rokkokuton brand produced throughout Japan, those produced in Gunma Prefecture are given the ‘Joshu’ prefix. By giving a feed combining grain-type starchy ingredients with high-nutrition legumes and miscellaneous grains, the unique umami of pork deepens for a rich, flavorful finish. The meat quality is firm, with a fine grain — the pale cross-section and white, beautiful fat are eye-catching. Even after heating, a gently melting texture in the mouth can be enjoyed. The rearing uses a three-breed cross — Landrace × Large Yorkshire as the dam line, crossed with Duroc as the sire line — producing a meat quality that combines both flavor and softness. Shipping is targeted at approximately 180–190 days of age, with the umami deepening further through patient, time-taking rearing. Production is consistently carried out at I-Pork Co., Ltd.’s designated farms — delivering stable quality under the quality management system of the Ito Ham-Yonekyu Holdings Group. The trademark ‘Joshu Rokkokuton’ was formally registered in May 2023, elevating the reliability of the brand. Even in simple preparations like shabu-shabu, the umami nurtured by the 6 grains and the sweetness of the fat can be savored to the fullest.
Basic Information
- Name
Joshu Rokkokuton - Production Area
Designated farms in Gunma Prefecture - Management Body
I-Pork Co., Ltd. (Ito Ham Yonekyu Holdings Group) - Breed / Crossbreeding
Female (Landrace × Large White) × Male: Duroc / Female (Large White × Landrace) × Male: Duroc - Meat Characteristics
Proprietary six-grain blend develops rich umami. Firm, fine-grained meat with clean white fat that stays soft and yielding after cooking. - Feed Characteristics
Original specified compound feed blending 6 grains: wheat, barley, rice, corn, sorghum (milo), and soy in balanced proportions. - Shipping Age
Approx. 180–190 days - Annual Production
Approx. 20,000 head annually - Signature Dish
Shabu-shabu - Certifications
Trademark registration: May 10, 2023 (registered as Rokkoku Ton) - Related URLs
Gunma Pork Kingdom | Brand Directory - Source
Branded Pork Guidebook 2026, p.81
銘柄 | 豚肉王国！ぐんまポーク｜多彩な銘柄を誇る群馬の豚肉
Last updated
6/21/2026