Select Langage/言語選択/语言选择


Koi-Navi provides information on award-winning Koi as well as symposiums and fish-keeping pointers by major breeders.

It will be expanded as a website starting this year. Thank you for your continued support.


Featured Events


The 6th Super Mud Pond Special Auction

Please visit our site at
Applications for the auction will be accepted at any No.1 Koi’s dealer in your area.

The auction opens at 9:00 a.m. April 27(Fri)〜

The auction closes at 9:00 p.m. April 30(Mon)

The 17th Famous Breeder Internet Auction

The auction opens at 9:00 a.m. May 3(Thu)

The auction closes at 9:00 p.m. May 6(Sun)

All items


Jumbo Tosai Sale

Starts at 10:00 a.m. on April 29th (Sun)

It’s that time of the year: time for our customary spring event, the Jumbo Tosai Festival!
Thanks to your continued support, this festival has become a perennial favorite among the several events held by our store, held for the last ten years It has grown into a spectacular celebration producing koi that have taken multiple top prizes at national exhibitions, including overall tournament victories. Thanks especially to the cooperation of 11 producers in all this year, close to double last year’s participation, we were able to collect only the most meticulously selected special yearling fish. We’ll bring you a magnificent lineup, just the right thing for a real festival feeling! We look forward to seeing you all there!


■ We will receive your order in advance [closing date / 5:OOPM(JST) April 28th(Sat)]. The price includes keeping charge of this year.

1. Please contact us by fax(+81-568-77-8997) or e-mail( then let us know the list number of koi that you'd like to purchase. The closing date for application is 5:OOPM(JST) April 28th(Sat).

2. If advance order would be crossed, open drawing lots will be taken place.

Regarding Koi Keeping Fee and Female Guarantee

[Regarding Koi Keeping Fee and Female Guarantee] For koi listed for sale with the comment "Koi Keeping Fee Included", leaving the koi at our koi keeping facility is optional. In the unlikely event of the death of the koi in our koi keeping service, we do not provide any compensation for death, injury or/and quality decline. Upon understanding of this condition, please let us know if you intend to keep your koi with us. Furthermore, if no reply regarding koi keeping is given, we will process your application on the assumption that you intend to keep your koi with us. *If a koi sold with a female guarantee is determined to be a male, we will provide a full refund.