Chosyu Kurokashıwa (Chosyu Chicken Meat)

Chōshū Kurokashiwa (Japanese: 長州黒かしわ) is a local chicken (jidori) meat produced in Yamaguchi Prefecture, Japan, particularly in the cities of Nagato and Mine. The product was registered under Japan’s Geographical Indication (GI) system on 27 March 2024 with registration number 152.^【1】

Chōshū Kurokashiwa is a breed derived from the Kurokashiwa chicken, a variety recognized as a National Natural Monument of Japan.^【2】 Its most distinctive feature is a tender yet firm texture that is chewable without being tough. It also offers a medium fat content and a rich umami flavor. The meat is known for maintaining its tenderness even after cooking.^【3】

To preserve the quality and jidori status of the product, specific production standards are enforced:

• Genetic Origin: Chōshū Kurokashiwa carries the genetic traits of the Kurokashiwa breed native to Yamaguchi Prefecture. Ongoing efforts by Yamaguchi Prefecture aim to conserve this breed and achieve commercially viable meat quality.^【4】
• Breeding Duration: Chicks are fed for a minimum of 80 days after hatching. This period is essential for developing the meat’s characteristic texture and flavor.^【5】
• Breeding Environment: Throughout the entire rearing period, the birds are raised in a cage-free system with free movement within coops. From day 28 onward, stocking density is maintained at no more than 10 birds per square meter. This method promotes physical activity and enhances meat quality.

The production areas of Nagato and Mine have historically been regions with well-developed fishing industries. In the past, abundant fish scraps and marine byproducts from local fisheries were readily and economically available as poultry feed. This facilitated the widespread adoption of poultry farming in the region and integrated chicken meat into the local diet, notably in dishes such as yakitori.

To create a regional brand based on local resources, Yamaguchi Prefecture undertook a long-term development program centered on the renowned local Kurokashiwa breed. This initiative ultimately led to the emergence of the Chōshū Kurokashiwa brand.