*Ends November 30th 2025. T&Cs apply.
Official Farm Name: Aokiya Koi Farm
Breeder: Harou Aoki
Area: Katakai, Ojiya
Raising Area: 20.000 m2
Varieties: Doitsu Koi varieties
Official Farm Name: Aoki Koi Farm
Breeder: Aoki Masaki
Area: Yamakoshi
Raising Area: 25.000 m2
Varieties: Goshiki, Asagi, Shusui, Kohaku and other varieties
Official Farm Name: Yamacho Koi Farm
Breeder: Hiroi Nobuaki
Area: Kawaguchi, Nagaoka
Raising Area: 20.000 m2
Varieties: Platinum Ogon, Kikokuryu & Kumonryu
Official Farm Name: Dainichi Koi Farm
Breeder: Mano Futoshi & Mano Shigeru
Area: Sanbusho, Ojiya
Raising Area: 400.000 m2
Varieties: Showa, Kohaku, Sanke, Karashigoi and other varieties
Official Farm Name: Genjiro Koi Farm
Breeder: Takashi Kobayashi
Area: Kawaguchi, Nagaoka, Niigata Prefecture
Varieties: Kohaku, Sadazo Sanke, Kujaku, Matsub, Yamabuki Ogon and Hi Utsuri
Official Farm Name: Hasegawa Koi Farm
Breeder: Mitsuo Hasegawa
Area: Ojiya, Niigata
Varieties: Kohaku, and a small amount of Showa
Official Farm Name: Hirashin Koi Farm
Breeder: Hirasawa Hiroyuki
Area: Minaminigoro, Ojiya
Raising Area: 20.000 m2
Varieties: Hikarimono, Goshiki, Yamabuki, Hi Utsuri, Kawarimono
Official Farm Name: Hiroi Koi Farm
Breeder: Hiroi Kazuyoshi
Area: Koguriyama, Ojiya
Raising Area: 100.000 m2
Varieties: Go Sanke, Doitsu Go Sanke, Goshiki, GR Goshiki, GR Kohaku and other varieties Number of mud ponds 60, Parent stock 80, Yearly production 40'000 pcs
Official Farm Name: Hoshikin Koi Farm
Breeder: Hoshino Katsuyuki
Area: Sanbusho, Ojiya
Raising Area: 100.000 m2
Varieties: Kohaku, Showa
Official Farm Name: Hoshiyone Koi Farm
Breeder: Takeo Hoshino
Area: Takezawa, Yamakoshi Village, Ojiya City, Niigata Prefecture
Varieties: Gin Matsuba, Kohaku, Sanke, Gin Rin Showa Kujaku and Kikokuryu
Official Farm Name: Hosokai Koi Farm
Breeder: Hosokai Masaru
Area: Ojiya
Raising Area: 80.000 m2
Varieties: Go sanke, Goshiki, Goromo, Asagi, Shusui and other varieties Number of mud ponds 100, Parent stock 100, Yearly production 50'000 pcs
Official Farm Name: Ikarashi Koi Farm
Breeder: Ikarashi Toshinobu
Area: Yamakoshi, Nagaoka
Raising Area: 50.000 m2
Varieties: Go Sanke, Kawarimono and other varieties Number of mud ponds 80, Parent stock 100, Yearly production 75'000 pcs
Official Farm Name: Ozumi Ikarashi Koi Farm
Breeder: Ikarashi Hidetoshi
Area: Ozumi, Nagaoka
Raising Area: 120.000 m2
Varieties: Go Sanke, Hikarimono, Kikokuryu, Beni Kumonryu Kawarimono and other varieties
Official Farm Name: Isa Koi Farm
Breeder: Isa Mitsunori
Area: Ojiya
Raising Area: 70.000 m2
Varieties: Showa, Kohaku, Sanke
Official Farm Name: Maruyo Yorien
Breeder: Isa Kazuhiko
Area: Uragara, Ojiya
Raising Area: 35.000 m2
Varieties: Ki Utsuri, Doitsu Kujaku , Ginrin, Goromo, Goshiki, Kawari & other varieties
Official Farm Name: Izumiya Koi Farm
Breeder: Mano Ryu
Area: Minaminigoro, Ojiya
Raising Area: 100.000 m2
Varieties: Yamabuki Ogon, Go Sanke, Goromo
Official Farm Name: Kaneko Koi Farm
Breeder: Kaneko Yasuaki
Area: Nigorisawa, Nagaoka
Raising Area: 30.000 m2
Varieties: Kujaku, Shiro Utsuri, Hikarimono and other varieties. Also Tamasaba. Number of mud ponds 55, Parent stock 60, Yearly production 30'000 pcs
Official Farm Name: Kanno Koi Farm
Breeder: Hirasawa Kazuhiro
Area: Yamakoshi, Nagaoka
Raising Area: 50.000 m2
Varieties: Goshiki, Ochiba, Kin Showa, Go Sanke
Official Farm Name: Koi No Kansuke
Breeder: Tomono Seji
Area: Ojiya
Raising Area: 30.000 m2
Varieties: Kohaku, Ginrin Kohaku, Showa, Ginrin Showa, Sanke
Official Farm Name: Koshiji Koi Farm
Breeder: Kase Kiyoshi
Area: Iwada, Nagaoka
Raising Area: 80.000 m2
Varieties: Doitsu Go Sanke, Showa, Goshiki, Yamatonishiki, Kikusui, Kikokuryu and other varieties Number of mud ponds 50, Parent stock 100, Yearly production 20'000 pcs
Official Farm Name: Kawakami Koi Farm
Breeder: Kawakami Takahashi
Area: Uragara, Ojiya
Raising Area: 50.000 m2
Varieties: Shiro Utsuri, Kumonryu, Goshiki, Beni Kumonryu and other varieties Number of mud ponds 80, Parent stock 60, Yearly production 150'000 pcs
Official Farm Name: Marusen-Kobayashi Koi Farm
Breeder: Kobayashi Naoto
Area: Uonuma
Raising Area: 30.000 m2
Varieties: Shiro Utsuri, Showa and other varieties
Official Farm Name: Koda Koi Farm
Breeder: Hoshino Masato
Area: Kawaguchi, Nagaoka
Raising Area: 50'000 m2
Varieties: Ginrin Showa, Goshiki, Ochiba and many other varieties.
Official Farm Name: Konishi Koi Farm
Breeder: Makoto Konishi
Area: Hiroshima Prefecture
Raising Area: 80-100 mud ponds
Varieties: Specialising in Karashigoi, Shusui, Kujaku as well as other varieties
Official Farm Name: Mano Nishikigoi
Breeder: Mano Tadashi
Area: Minaminigoro, Ojiya
Varieties: Kohaku, Sanke, Showa, Doitsu Showa and other varieties
Official Farm Name: Maruboshi Koi Farm
Breeder: Maruboshi Koi Farm
Area: Nagaoko
Varieties: Kohaku
Official Farm Name: Marudo Koi Farm
Breeder: Hisashi Hirasawa
Area: Nagaoka, Niigata
Raising Area: 100.000 m2
Varieties: Kohaku, Sanke, Asagi, Ogon, Chagoi and Karashigoi
Official Farm Name: Nishiki Maruhide Koi Farm
Breeder: Hirasawa Hidemasa
Area: Ojiya
Raising Area: 35 ponds
Varieties: Doitsu Go Sanke, Kohaku, Kawarimono
Official Farm Name: Maruhiro Koi Farm
Breeder: Hirasawa Hironori
Area: Minaminigoro, Ojiya
Raising Area: 100'000 m2
Varieties: Go Sanke, Utsurimono, Hikarimono, Kawarigoi and many other varieties
Official Farm Name: Marujyu Koi Farm
Breeder: Shigeyoshi Tanaka
Area: Yamakoshi, Nagaoka
Raising Area: 60'000 m2
Varieties: Tancho, Go Sanke, Goromo, Ginrin varieties and other varieties
Official Farm Name: Marusada Koi Farm
Breeder: Ikarashi Toshikatsu
Area: Yamakoshi, Nagaoka
Raising Area: 50'000 m2
Varieties: Tancho Showa, Ginrin Showa, Goromo and other varieties
Official Farm Name: Marusaka Koi Farm
Breeder: Hiroi Teruyuki
Area: Minaminigoro, Ojiya
Raising Area: 50'000 m2
Varieties: Hikarimono and other varieties Number of mud ponds 80, Parent stock 20, Yearly production 55'000 pcs
Official Farm Name: Marusei Koi Farm
Breeder: Hirasawa Yoshiyuki
Area: Kawaguchi, Nagaoka
Raising Area: 100.000 m2
Varieties: Go Sanke, Kujaku, Kawarimono and many other varieties Number of mud ponds over 300, Parent stock 200, Yearly production 200'000 pcs
Official Farm Name: Marushin Koi Farm
Breeder: Mitsuhiro Tanaka
Varieties: Dpoitsu Showa, Budo and Sumi Goromo. Also well known for his Tamasaba.
Official Farm Name: Nagashima Koi Farm
Breeder: Otozo - Mr Nagashima
Area: Mushigame, Yamakoshi Area - New house is in Takezawa
Raising Area: 35'000m2
Varieties: Showa, Sanke Shiro Utsuri, Kohaku and a small number of Tancho
Official Farm Name: Oofuchi Fukasawa Koi Farm
Breeder: Oofuchi Hideaki
Area: Nagaoka
Raising Area: 100 ponds
Varieties: Kawarimono, Kujaku, Shusui, Sanke and many other varieties Number of mud ponds 100, Parent stock 100, Yearly production 20'000 pcs
Official Farm Name: Otsuka Koi Farm
Breeder: Otsuka Yoshikazu
Area: Koguriyama, Ojiya
Raising Area: 50.000 m2
Varieties: Goshiki, Asagi, Kage Shiro Utsuri, Ki Utsuri, Aka Matsuba, Ochiba Shigure, Budo Goromo, Goshiki Showa, Kawarimono, Go Sanke and other varieties. Number of mud ponds 50, Parent stock 30, Yearly production 35'000 pcs.
Official Farm Name: Saito fish farm
Breeder: Saito Kiyotaka
Area: Nagaoka
Varieties: Kohaku, Karashi, Hikarimono, Kawari, etc
Official Farm Name: Sakazume Koi farm
Breeder: Sakazume Shinsaku
Area: Koguriyama, Ojiya
Varieties: Go Sanke, Goromo, Yamatonishiki, Kikusui and other varieties Number of mud ponds 70, Parent stock 50, yearly production 50.000 pcs
Official Farm Name: Seijuro Suzusei Koi Farm
Breeder: Seiichi Suzuki
Varieties: Showa, Beni Kumonryu, Kumonryu, Kohaku & Sanke
Official Farm Name: Sekiguchi Koi Farm
Breeder: Sekiguchi Masayuki
Area: Minamiuonuma
Raising Area: 40'000 m2
Varieties: Showa, Pearl Gin Rin, Benigoi
Official Farm Name: Shinoda Koi Farm
Breeder: Shinoda Masanori
Area: Koguriyama, Ojiya
Raising Area: 80'000 m2
Varieties: Doitsu Go Sanke, Ginrin Showa, Hi Utsuri Number of mud ponds 50, Parent stock 100 pcs, Yearly production 65'000 pcs
Official Farm Name: Shintaro Koi Farm
Breeder: Saito Masaru
Area: Yamakoshi, Nagaoka
Raising Area: 30'000 m2
Varieties: Kohaku, Sanke, Showa
Official Farm Name: Suda Fish Farm
Breeder: Suda Kazutaka
Area: Katakai, Ojiya
Raising Area: 100.000 m2
Varieties: Go Sanke, Ginrin Go Sanke, Yamabuki and other varieties, also Longfin varieties and Tamasaba.
Official Farm Name: Takahashi Fish Farm
Breeder: Takahashi Takehisa
Area: Uonuma
Varieties: Showa, Sanke, Kohaku, Hikarimono and other varieties
Official Farm Name: Takatatsu Koi Farm
Breeder: Takano Kunitoshi
Area: 50'000 m2
Raising Area: Yamakoshi, Nagaoka
Varieties: Kinshowa, Kujaku, Ochiba, Chagoi and other varieties
Official Farm Name: Tanaka Koi Farm
Breeder: Kazuhiro Tanaka
Area: Takezawa, Yamakoshi
Raising Area: 20'000 m2
Varieties: Kohaku, Sanke, Showa, Shiro Utsuri, Asagi, Shusui and other varieties
Official Farm Name: Yagenji Koi Farm
Breeder: Daisuke and Toshinori Ishihara
Area: Yamakoshi Village
Raising Area: 50.000 m2
Varieties: Kohaku, Ginrin Kohaku, Sanke, Doitsu Sanke, Showa, Ginrin Showa, Asagi, Goshiki, Karashigoi, Kikusui, and Kujaku.