Koshiji
Koi
Farm

Koshiji Koi Farm, the farm of Kiyoshi Kase, is in the Iwata area of Nagaoka City's Koshiji district in Niigata. Kase was a cook before he began breeding koi as a hobby at around 20, and he set up the farm in 1969 at 25 to breed koi full time. The farm is known for creating new varieties, including Ginga (Kujaku crossed with Hajiro) and Beni Kumonryu, often working jointly with Aoki Koi Farm. It also breeds metallic Doitsu varieties such as Kikokuryu, along with Showa and Goshiki. A Koshiji Showa won its division and the Niigata Governor's Prize at the 59th Niigata Prefecture Nishikigoi Show in October 2019.