Marusak Koi Farm – is now run by Teruyuki Hiroi, but was originally founded by his grandfather Teruchiyo in the late 1940’s in Ojiya. They have been well known for their Sanke for many years, but are also now producing many varieties of metallic koi such as Kin Kikokuryu, Doitsu Kujaku, Kikokuryu, Lemon Hariwake, Ginrin Chagoi as well as Doitsu Kohaku, Doitsu Sank and Midorigoi.
