Home Jidori and branded chicken Native breeds
Barred Plymouth Rock
横斑プリマスロックNative breed No.9
Barred Plymouth Rock is one of the 38 native breeds listed in Japan's JAS standard for jidori (No. 9 in Annex A).
- National natural monument
- No individual designation
Brands whose crosses include this breed
- Aomori Shamorock — 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
- Kuro Satsuma-dori — A first-generation cross of a Satsuma-dori male with a Barred Plymouth Rock female (created in 2006)
- Yamagata Jidori — A three-way cross: the sire is a hybrid of a red-laced Shamo male and a Nagoya female, the dam a Barred Plymouth Rock
- Kyo Jidori — A two-way cross: large Shamo sire line, Barred Plymouth Rock dam line
These are the brands whose mating scheme, as given in that brand's source, names this breed. The share of its bloodline is not shown.
In numbers
The brands using Barred Plymouth Rock are spread across 4 prefectures (Aomori, Yamagata, Kyoto and Kagoshima). The 2 that set a minimum rearing period require 75 to 100 days (all chicken brands range from 75 to 150). The 2 that cap birds per square metre allow 5 to 8 (all brands: 2 to 10).
Counts cover only the brands in this guide.
Sources
Sources are in Japanese
- [J001] 地鶏肉の日本農林規格（平成11年農林水産省告示第844号、最終改正 令和7年9月2日） — Ministry of Agriculture, Forestry and Fisheries ・ Primary source ・ Accessed 2026-09-24
- [J002] 地鶏肉の日本農林規格 新旧対照表（令和7年9月2日、JAS 0844:2025 附属書A 在来種） — Ministry of Agriculture, Forestry and Fisheries ・ Primary source ・ Accessed 2026-09-28