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Koi auctions

By the koi.wiki editorial team · Updated

Key facts: Koi auctions are competitive sale events, held by breeders, clubs, and online dealers, in which bidders compete for individual koi, ranging from inexpensive stock to record-breaking show-quality fish[1][2].
Koi auctions are a common method of buying and selling nishikigoi (錦鯉), ranging from farm auctions held directly by Japanese breeders to club auctions run by hobbyist organizations and ongoing online auctions operated by dealers[1][2][3]. Auctions can involve inexpensive young stock or exceptionally expensive, show-proven adult koi[5].The most widely reported example is the sale of S Legend, a Kohaku (紅白) sold at a farm auction in Hiroshima, which set a record price[1][7].

Farm auctions in Japan

Japanese breeders sometimes sell individual koi through auctions held directly at their farms. One widely reported example took place at the Sakai Fish Farm in Hiroshima, where a Kohaku named S Legend was sold after what was described as a fierce bidding war[1]. The fish, a nine-year-old female measuring 101 cm (3 ft 3 in), was purchased by Ying Ying Chung, described as an agent or managing director of the Sing Chang koi farm in Taiwan buying on behalf of a Chinese customer, for 203 million yen (about £1.4 million)[1][7]. According to the All Japan Nishikigoi Promotion Association, this koi was bred by Sakai Koi Farm in Hiroshima and the sale reached 230 million yen, the highest price recorded for a single koi at auction[6]. See Record koi prices and S Legend for further detail on this and other high-value sales.According to British koi expert Tim Waddington, as quoted by a UK newspaper, the sale was a record price for a single koi, with the previous highest sale around £400,000, and news of the sale spread quickly among koi dealers in the United Kingdom[1]. The same source reports that the buyer intended to let the fish continue competing in Japanese koi shows, and that it could later be bred, with the potential to produce up to 500,000 eggs, of which no more than about 5,000 would be of quality suitable for sale[1].

Online auctions

Online auctions have become a common sales channel, according to the US-based dealer Kodama Koi Farm, which describes running koi auctions that end daily, with special auctions typically concluding on Wednesdays and Sundays[3][8]. Listings observed on the dealer's site show individual koi with a starting bid, a "buy now" price, an estimated value, and details such as breeder, sex, birth year, size, and variety[9]. The same dealer states that koi are quarantined for three weeks before auction or shipment and tested by a state agricultural board[10].The All Japan Nishikigoi Promotion Association notes a general increase in online koi sales and recommends buying from retailers affiliated with the association to help ensure quality and health standards, citing disease risk as a concern with online purchases[6].

Club and show auctions

Hobbyist clubs commonly hold their own koi auctions as part of regular meetings or annual events. The Australian Koi Association states that auctions, along with illustrated lectures and panel discussions, are a regular feature of its meetings, and holds dedicated auction events at a showground venue with set start times[2]. The Koi Society of Western Australia likewise lists a koi auction among its scheduled annual events[11]. Zen Nippon Airinkai's Southern California chapter holds an annual koi auction as one of its special yearly events alongside its open koi show[12].Auctions are also sometimes incorporated into koi show weekends. The Koi Club of San Diego's event schedule lists a koi auction, run by a named auctioneer, held after judging and before the presentation of trophies[4]. For more on how such events are organized, see Koi shows and How koi are judged.

Pricing and value at auction

Prices at auction vary enormously. According to Kodama Koi Farm, an imported Japanese koi can be worth $100 to $1,500 on average, while some of the most prized koi, owned by collectors for show purposes, are valued above $100,000 or are not for sale at all[5]. A UK newspaper similarly reports that koi can cost as little as £12.50, with larger, near-perfect specimens selling for £2,000 to £20,000, against the £1.4 million record for S Legend[1]. The All Japan Nishikigoi Promotion Association states that koi can be purchased for as little as 500 or 1,000 yen, making the hobby accessible, even though the record auction sale reached 230 million yen[6]. See How much do koi cost? for a broader discussion of pricing factors.Kodama Koi Farm states that bloodline, body shape, pattern quality, variety, and rarity are primary determinants of price, and that size and age also raise cost, since larger, older koi such as nisai (二歳) or older fish tend to be more expensive than young tosai (当歳) stock[5]. Related variety pages include Kohaku, Taisho Sanshoku (Sanke), and Showa Sanshoku, which the dealer Kodama Koi Farm and others describe among the most commonly high-valued varieties at auction[13].

Bidding, genetics and traceability

At auctions for elite koi, bidding can be competitive. Kodama Koi Farm describes its own auctions for Gosanke (御三家) koi as showcasing fish from leading Japanese breeders and setting benchmark prices that influence the broader market[14]. For more on these varieties, see Kohaku, Taisho Sanshoku (Sanke), and Showa Sanshoku.According to a 2026 report by the Japan External Trade Organization (JETRO), Japanese export value of nishikigoi rose 37.9% year on year in 2025 to about 9.973 billion yen, even as koi from other countries such as China and Southeast Asian nations increasingly appear in overseas markets[15]. The report states that the All Japan Nishikigoi Promotion Association has introduced a production certificate registration system, and that some producers are exploring microchip identification to verify bloodline and combat misrepresentation of non-Japanese koi as Japanese-bred, a concern raised by Yukari Suda, a director at Japan Koi Service in Ojiya, Niigata Prefecture[15]. The report also describes an "AI Koi Show," held in February 2026, in which artificial intelligence trained on data from more than 50,000 previously exhibited koi scored body conformation, pattern, and sheen in a first-round screening, followed by final judging by association members, intended partly to let overseas-kept koi be evaluated by image without travel[15].

Common questions

What was the most expensive koi ever sold at auction?
S Legend, a Kohaku bred by Sakai Koi Farm in Hiroshima, sold for 203 million yen (about £1.4 million, or $1.8 million) at a farm auction, reported by some sources as reaching 230 million yen[1][6][5].
Can I buy koi through an online auction?
Yes; dealers such as Kodama Koi Farm run ongoing online auctions with starting bids and "buy now" prices, though the All Japan Nishikigoi Promotion Association recommends buying from association-affiliated retailers because of disease risk concerns with online sales[3][6].
Do koi clubs hold their own auctions?
Many hobbyist clubs, including the Australian Koi Association, the Koi Society of Western Australia, and ZNA SoCal, hold regular or annual koi auctions for members[2][11][12].
How much do koi typically cost at auction?
Prices range widely, from roughly $100–$1,500 for an average imported Japanese koi up to over $100,000 for elite show-quality fish, with the record sale reaching into the hundreds of millions of yen[5][1].
Why are some auction koi much more expensive than others?
Kodama Koi Farm states that bloodline, body shape, color quality, pattern, variety rarity, size, and age are the main factors driving price differences between auction koi[5].

References

  1. ^ World's most expensive Koi Carp is bought for £1.4 million - £1m more than previous world record | Daily Mail Online. dailymail.co.uk. dailymail.co.uk/news/article-6240401/Japanese-koi-fish-sells-record…. Retrieved November 2026.
  2. ^ Australian KOI Association. akakoi.com.au. akakoi.com.au/. Retrieved November 2026.
  3. ^ Kawarimono Archives - Kodama Koi Farm. Kodama Koi Farm (koi dealer). kodamakoifarm.com/variety/kawarimono/. Retrieved November 2026.
  4. ^ Koi Club of San Diego - Schedule of Events 2026. koiclubofsandiego.org. koiclubofsandiego.org/Schedule6. Retrieved November 2026.
  5. ^ How Much Do Koi Fish Cost? Koi Pricing Guide for USA. Kodama Koi Farm (koi dealer). kodamakoifarm.com/how-much-do-koi-fish-cost/. Retrieved November 2026.
  6. ^ Q&A - All Japan Nishikigoi Promotion Association. All Japan Nishikigoi Promotion Association. jnpa.info/en/qa/. Retrieved November 2026.
  7. ^ S Legend – Koi Judges UK | The former BKKS JSC. Koi Judges UK. koijudges.uk/s-legend/. Retrieved November 2026.
  8. ^ Bekko Archives - Kodama Koi Farm. Kodama Koi Farm (koi dealer). kodamakoifarm.com/variety/bekko/. Retrieved November 2026.
  9. ^ Hirenaga - Koi For Sale - Kodama Koi Farm. Kodama Koi Farm (koi dealer). kodamakoifarm.com/variety/butterfly-hirenaga/. Retrieved November 2026.
  10. ^ How To Care For Your Koi Fish After Receiving It - Kodama Koi. Kodama Koi Farm (koi dealer). kodamakoifarm.com/koi-care-after-receiving/. Retrieved November 2026.
  11. ^ Koi Society of Western Australia. koiclubwa.com. koiclubwa.com/. Retrieved November 2026.
  12. ^ About Us – Zen Nippon Arinkai Southern California. znasocal.org. znasocal.org/about/. Retrieved November 2026.
  13. ^ Which Koi is the Rarest: How Can I Judge Superiority?. Kodama Koi Farm (koi dealer). kodamakoifarm.com/rarest-koi-fish/. Retrieved November 2026.
  14. ^ All About Gosanke Koi Fish Varieties "The Big Three!". Kodama Koi Farm (koi dealer). kodamakoifarm.com/gosanke-koi-fish/. Retrieved November 2026.
  15. ^ デジタル技術を活用した日本産錦鯉の価値普及 | 地域・分析レポート - 海外ビジネス情報 - ジェトロ. JETRO. jetro.go.jp/biz/areareports/2026/6c494243103c23ea.html. Retrieved November 2026.