Isa
Koi
Farm

Isa Koi Farm was founded in 1970 in Ojiya City, Niigata Prefecture, and is now run by the second generation, Mitsunori Isa. The farm has produced mainly the Gosanke varieties of Showa Sanshoku, Taisho Sanshoku and Kohaku, and today concentrates on Showa and Kohaku. Its Showa are known for the beauty of their sumi (black pattern), which is why they are called "Isa Showa". In a 2005 interview the farm said Showa made up more than 70% of its production, and that it had produced Showa of about 80 cm, at a time when Showa were thought not to grow that large. An Isa Showa won Grand Champion at the 50th Niigata Nishikigoi Show in 2010.