The Marujyu Koi Farm, located in Yamakoshi, Nagaoka, is run by Tanaka Shigeyoshi1. They are known for their unique combination of Koi varieties including Tancho, Go Sanke, Goromo, Ginrin varieties, and other varieties.

The farm has a large raising area of 60,000 m. They offer a great selection of Koi. You can find Koi available to buy from Marujyu Koi Farm online.