Food · Fermented foods

Kōshu-Beef (Wagyu × Holstein F1 Crossbred)

交雑牛肉 (Kōshu-gyū-niku)

Also known as: Kōshu-gyū, F1 crossbred beef, Wagyu × Holstein, F1 Wagyu cross, 国産牛 (F1), 交雑種

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At a glance

Category	Food
Japanese labeling name	牛交雑牛肉 — ばら / もも / ヒレ / リブロース
Common Japanese notations	交雑牛, F1, 国産牛 (F1), 交雑種, 和牛×ホルスタイン F1
Origin	F1 crossbred beef — Wagyu (sire, typically Japanese Black 黒毛和種) × Holstein (dam) hybrid; principal production Hokkaido, Tohoku, Kyushu; balances Wagyu marbling/flavor with Holstein production efficiency; positioned as mid-tier between standard Holstein dairy-steer beef and premium pure-Wagyu; commonly labeled 'kokusan-gyū' (国産牛) or 'F1' but NOT permitted to be called 'Wagyu'
Typical functions	Mid-tier premium domestic beef — balances marbling and price, Yakiniku, sukiyaki, shabu-shabu mid-tier supply, Restaurant 'wafū-steak' channel raw material, Beef-bowl premium upgrade option (gyūdon premium tier), 4 standard cuts: bara, momo, hire, rib-rōsu
Regulatory status in Japan	Standard food labeling. Origin and breed disclosure permitted (kōshu / F1 may be declared). Beef JAS-recommended-disclosure allergen. 'Wagyu' label PROHIBITED — F1 crossbred is not permitted to use 'Wagyu' or '和牛' labels — only purebred JBS-certified animals qualify. Beef-traceability act ID-tracking required.

Kōshu-gyū (交雑牛 / F1) is Japanese F1 crossbred beef — **Wagyu sire × Holstein dam** hybrid. Mid-tier between Holstein dairy-steer beef and pure Wagyu. Hokkaido, Tohoku, Kyushu production. **'Wagyu' label is PROHIBITED — only JBS-certified purebreds qualify.**

Classification

Tags below link to other ingredients sharing the same attribute, so you can pivot from one ingredient to its peers.

Product applications

Functions

Flavoring

Regulatory tags

Culinary ingredient

Origin

Animal-derived

Used in (typical product categories)

Finished-product categories that commonly include this ingredient in Japanese-market formulations.

Fresh kōshu-gyū retail (mid-tier 'kokusan-gyū' positioning)
Foodservice yakiniku/sukiyaki B2B
Frozen-block B2B

What it is

F1 crossbred Bos taurus — Wagyu sire (Japanese Black) × Holstein dam.

Typical uses in Japanese products

Mid-tier domestic premium beef (marbling/price balance).

Yakiniku, sukiyaki, shabu-shabu mid-tier.

'Wafū-steak' channel.

Premium-tier gyūdon.

4 standard cuts: bara, momo, hire, rib-rōsu.

For OEM: 4-cut fresh retail (kokusan-gyū / F1 label), foodservice yakiniku B2B, frozen-block B2B.

Regulatory classification in Japan

Standard food labeling.

**'Wagyu' label PROHIBITED for F1 crossbred — only JBS-certified purebreds qualify.**

**Beef JAS-recommended-disclosure allergen.**

Beef-traceability act ID-tracking required.

Regulatory classification in other markets

EU	Beef is not a major-allergen. EU traceability and BSE-monitoring required.
USA	USDA inspection equivalence required. 'Wagyu' US labeling rules differ — US permits Wagyu-cross labeling (varies by state).
China	Premium import market.
Korea	Premium import market.

Example products

Example finished products will be added after verification.

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Related ingredients

Used in similar product applications

Other ingredients commonly used in the same finished-product families.

Sharing similar functions

Ingredients that overlap on functional benefit tags.

From the same origin

Other ingredients that share an origin classification.

References

MEXT Standard Tables of Food Composition — 牛交雑牛肉各部位

Last updated: 2026-04-28. Ingredient entries are reviewed at least annually against current regulatory listings.