Isa Tosai Auction

Isa Koi Farm is well known as one of the world's top gosanke (kohaku, sanke, showa) breeders. Mr. Hajime Isa, along with his son, Mitsunori have koi breeding down to a science.

Scroll down this page to see the Isa koi we have available as well as many past award winning koi from Isa Koi Farm.

Award Winning Koi From ISA Koi Farm

All Japan Koi Show Superior Champion

47th All Japan Koi Show Male Mature Champion

Nogyosai Koi Show The 50th (2010) Overall First Prize

The 34th All Japan Young Koi Show Mature Champion

Mitsunori Isa

Isa Koi Farm is well known as one of the world's top Showa and Kohaku breeders with many koi show awards to prove it. Mr. Isa has koi breeding down to a science.

Mamoru Kodama (founder of Kodama Koi Farm) visits Isa Koi Farm each year. He notes, “One thing that is constantly reinforced by Mr. Isa is how important their mud pond soil is”.

Mr. Isa explains, “Koi have an innate talent passed from their parents. It is nothing but (good) soil that will bring out the talent. Of course, various skills of breeders are important; but soil has a larger influence than that. For example, even if we breed with thoroughbred parents, if the soil quality is not good, we cannot breed high quality koi like the parents.” — Quote from Koishi book

Get your very own Isa koi and watch how it develops!

Isa Green House

Niigata Koi Mud pond

Mitsunori Isa , Isa staff and Taro Kodama

They are taking care of All Isa Koi

Inside Isa Koi Farm

Taking picture

We couldn't find any products in our online store for your search in our Isa Tosai Auction catalog,
BUT we may have inventory at the farm or in Japan, so please use the "Request a Koi" form to help us find your perfect koi fish.

Koi Auctions Ending Soon!

Place your bids now to win your choice of beautiful Japanese koi for sale at a great price! We always have a variety of fixed price koi and consistently run koi auctions ending daily; with most special auctions ending on Wednesday and Sunday each week.