Official farm name: Hiroi Koi Farm
Breeder: Hiroi Kazuyoshi
Area: Koguriyama, Ojiya
Raising area: 100.000 m2
Varieties: Go Sanke, Doitsu Go Sanke, Goshiki, GR Goshiki, GR Kohaku and other varieties Number of mud ponds 60, Parent stock 80, Yearly production 40.000 pcs
