The Marujyu Koi Farm, found in Yamakoshi, Nagaoka, have been breeding koi for over 60 years, passing on their essential skill and experience for 3 generations.

Initially, Marujyu's most popular type of koi was their sensational Showa.

Today, they are renowned for having a unique combination of high-quality koi, including much-loved Tancho, Goromo, and Ginrin varieties.