Home Jidori and branded chicken Aomori
Aomori Shamorock
青森シャモロック Aomori
English name: Aomori Shamorock — no official English name found, so romanised by this site.
Requirements for Aomori Shamorock: breed — Shamo (game fowl) cross; where raised — chicks are supplied only to residents of Aomori Prefecture whose farm the council has designated (no municipality is named for where the birds are raised); rearing period — 100 days from hatching for males and 120 days for females; housing — floor housing from day 28; from 28 days of age, 5 birds per m² or fewer. Also: from first feeding to 27 days of age: the brand’s starter feed, or a broiler feed with at least 20% crude protein and 2,900 kcal/kg or more — 3,000 kcal/kg — of metabolizable energy and no antibacterial additives; From 28 days of age to shipment: the brand’s finisher feed, or a broiler feed with at least 16% crude protein and 2,900 kcal/kg of metabolizable energy and no antibacterial additives.
Definition — what qualifies
| Breed | Shamo (game fowl) cross A first-generation cross of a Barred Shamo male (an improved game fowl) with a fast-feathering Barred Plymouth Rock female; only birds from this mating are Aomori Shamorock Native-breed blood percentage: 75% Sources: [C013] |
|---|---|
| Where it must be raised | Chicks are supplied only to residents of Aomori Prefecture whose farm the council has designated (no municipality is named for where the birds are raised) Sources: [C014] |
| Rearing period / age at shipment | 100 days from hatching for males and 120 days for females Sources: [C013] |
| How it is housed | Floor housing from day 28 from 28 days of age, 5 birds per m² or fewer Sources: [C013] |
| Other conditions |
From first feeding to 27 days of age: the brand’s starter feed, or a broiler feed with at least 20% crude protein and 2,900 kcal/kg or more — 3,000 kcal/kg — of metabolizable energy and no antibacterial additives [C013] From 28 days of age to shipment: the brand’s finisher feed, or a broiler feed with at least 16% crude protein and 2,900 kcal/kg of metabolizable energy and no antibacterial additives [C013] |
Japan's JAS standard for jidori sets four conditions: the chicks, the rearing period, the housing and the stocking density. A brand's own conditions can be stricter, or set differently. The JAS standard for jidori →
Native breeds named in this brand's cross: Shamo ・ Barred Plymouth Rock （All 38 native breeds）
The prefecture publishes its rearing conditions side by side with the JAS standard for jidori, but never says the brand conforms to it. The density of 5 birds per m² is twice as strict as JAS (10 from 28 days of age). The 75% native-breed blood percentage follows from the sire line at 100% and the dam line at 50%, as the prefecture sets out.
Compared with other brands
21 chicken brands set a minimum rearing period, from 75 to 150 days. The shorter of its two figures, 100 days, ranks 10th from the longest (1 other also uses 100). 17 brands cap the number of birds per square metre, from 2 to 10. 5 birds ranks 3rd from the most spacious (2 others also use 5).
This guide lists 3 brands from Aomori (also Aomori Towadako Wagyu and Hakkoda Beef). 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
- Aomori Shamorock Brand Promotion Council (secretariat: Aomori Prefecture Livestock Division)
- Official site
- https://www.pref.aomori.lg.jp/soshiki/nourin/chikusan/aoshamo.html
Other brands from Aomori
- Aomori Towadako WagyuBeef brands
- Hakkoda BeefBeef brands
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
- [C013] 青森シャモロックの生産定義について — Aomori Prefecture (Livestock Division) ・ Primary source ・ Accessed 2026-09-28
- [C014] 種卵及びひな配付 — Aomori Prefectural Industrial Technology Research Center, Livestock Research Institute ・ Primary source ・ Accessed 2026-09-28