Suda Koi Farm ( Suda Kazutaka) – is run by Atsushi Suda in Ojiya- city in the Niigata region. Established more than 20 years ago, they are one of the few farms in Japan that breed longfin or butterfly koi. They mainly specialize in Ginrin varieties of koi such as Kohaku, Sanke, Showa, Hikarimono, Kumonryu, and Gosanke.