TOKYO X
Tokyo
English name: TOKYO X — no official English name found, so romanised by this site.
Requirements for TOKYO X: breed — Tokyo X synthetic line; feed — before shipment, a designated feed of its own formulation for at least three months (Tokyo X basic rules); antibiotic-free designated feed throughout rearing. Also: designated slaughterhouses and distributors; Sold only through designated shops certified by the TOKYO X Association; Each piglet is ear-tagged for traceability. Not specified: where raised, age at shipment, grade.
Definition — what qualifies
| Breed | Tokyo X synthetic line The synthetic line Tokyo X, developed from Beijing Black, Berkshire and Duroc. Breeding stock is distributed by the Ome Livestock Center of the Tokyo Development Foundation for Agriculture, Forestry and Fisheries |
|---|---|
| Where it must be raised |
Not set (no such requirement in the source) |
| Age at shipment |
Not set (no such requirement in the source) |
| Feed | Before shipment, a designated feed of its own formulation for at least three months (Tokyo X basic rules); antibiotic-free designated feed throughout rearing Sources: [P011] |
| Grading |
Not set (no such requirement in the source) |
| Other conditions |
Designated slaughterhouses and distributors [P009] Sold only through designated shops certified by the TOKYO X Association [P011] Each piglet is ear-tagged for traceability [P011] |
Pork is graded under the Japan Meat Grading Association’s pork carcass standard, in five grades: Gokujō (極上), Jō (上), Chū (中), Nami (並) and Tōgai (等外, substandard). The same standard applies regardless of breed, age or sex. Pork grading (pork carcass standard) →
There is no condition limiting where the pigs are raised: the Association's page says production is “in Tokyo and currently also Ibaraki, Miyagi, Yamanashi and Gunma”. On 23 May 2025 the Foundation announced that spot checks at shops had found some pigs bred outside the prescribed crosses being shipped; the producers' association ordered the farm concerned to stop shipping (P010).
Compared with other brands
25 pork brands set a breed condition and 13 do not. 29 of the 38 pork brands set a feed condition. Only 8 of the 38 pork brands set a grade condition. TOKYO X sets breed and feed conditions but no grade condition.
This guide lists 2 brands from Tokyo (also Tokyo Shamo). By prefecture →
Compare this brand side by side with others → ・ Find brands by their rules →
Counts cover only the brands in this guide.
Guides
Managed by
- Managed by
- TOKYO X Producers' Association
- Official site
- https://tokyox-association.jp/
Other brands from Tokyo
- Tokyo ShamoJidori and branded chicken
About the names
Brand names are proper nouns. English names follow the brand association's official English page first, then the English name in the GI register, and otherwise romanised Japanese plus "Beef", "Wagyu" or "Pork". We never call a non-Wagyu brand Wagyu.
Sources
Sources are in Japanese
- [P009] トウキョウＸ — Tokyo Development Foundation for Agriculture, Forestry and Fisheries (Ome Livestock Center) ・ Primary source ・ Accessed 2026-10-06
- [P011] TOKYO Xって？ — TOKYO X Association ・ Primary source ・ Accessed 2026-10-06