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How koi spread worldwide

By the koi.wiki editorial team · Updated

The hobby of keeping koi eventually spread worldwide, with fish sold through pet shops and specialist dealers and hobbyists forming clubs to share knowledge.[7] Japanese organizations, most notably Zen Nippon Airinkai (ZNA), played a central role in spreading nishikigoi culture abroad, while government trade bodies have more recently promoted koi exports as part of Japan's cultural and economic outreach.[1][4]

Early clubs and international growth

Zen Nippon Airinkai traces its roots to the Oita Airinkai Koi Club, founded in Beppu in 1962 by Dr. Kuroki Takeo, whose activities spread across Japan and developed into Nishinihon Airinkai before becoming a nationwide association with chapters in every prefecture.[1] Dr. Kuroki also traveled internationally to promote nishikigoi keeping and published books that helped establish the foundations of the hobby.[1] According to ZNA America, the organization evolved from a regional Japanese hobby movement of “koi kichi” into a national and international body in 1968.[2]Separately, the All Japan Nishikigoi Promotion Association traces its own history to a preparatory committee formed in July 1968, followed by the first All Japan Nishikigoi Show in December 1968 and the association's establishment in January 1970.[8]

First overseas shows and chapters

ZNA states it was the first koi fancier association to hold major koi shows, beginning in Beppu in 1966 under the earlier Nishinihon Airinkai, with the fourth show in 1969 becoming the first truly national ZNA event.[2] A system of shows across seven Japanese districts led to the ZNA All Japan Show.[2]Accounts of the first American chapter differ slightly: ZNA America states the first USA chapter formed in Southern California in February 1973,[2] while ZNA Southern California's own site states its chapter was started in July 1972 by a small group of members.[3] Today ZNA has chapters in the United States, United Kingdom, South Africa, Germany, Holland, Belgium, Taiwan, Singapore, Malaysia, Australia, Thailand, Hong Kong, Indonesia and Brazil, according to ZNA America.[2] ZNA Southern California similarly describes chapters “throughout Europe, South Africa, Australia, the Far East, South America as well as the United States.”[3] The organization's International Division manages overseas chapters and friendship clubs, arranges judge exchanges and overseas koi shows, and promotes nishikigoi to the world.[9]

Collecting as a global hobby

According to an encyclopedia summary, koi are sold in many pet aquarium shops worldwide, with higher-quality fish available from specialist dealers, and collecting koi has become a social hobby in which enthusiasts join clubs and share knowledge.[7] Since the 21st century, affluent buyers, often from other Asian countries, have imported large quantities of koi from Niigata, driving up prices for high-quality fish; in 2018 one specimen reportedly sold to a Chinese collector for about $2 million, described as the highest price ever recorded.[7] Purchased koi are also bred in China and resold abroad, contributing to the spread of many varieties around the world.[7]More broadly in the ornamental fish trade, the United States is described as the single largest importer of ornamental fish in the world, with Los Angeles, Miami and Tampa serving as major US ports of entry from which large importers and wholesalers distribute fish to retailers.[10]

Japan's modern export drive

According to a 2025 JETRO report, nishikigoi have gained popularity abroad, especially in the United States, Asia and Europe, valued as symbols of Japanese traditional culture and aesthetics, and regarded as auspicious creatures in Chinese-speaking regions linked to feng shui culture and the Dragon Gate legend associated with Children's Day carp streamers.[4] In November 2022, Japan held the first World Nishikigoi Summit in Niigata Prefecture, the reported origin of nishikigoi, to promote economic and cultural exchange through koi.[4]Japan's Ministry of Agriculture, Forestry and Fisheries has designated nishikigoi as a priority export item, targeting a total export value of ¥10 billion by 2030, including growth in Vietnam, Indonesia, Thailand, the EU, China and Hong Kong.[4] According to Japan's MAFF, nishikigoi exports grew a further 37.9% in 2025 to about ¥9.97 billion, partly due to the resumption of exports to China after renewal of facility registrations and increased popularity in the US tied to local promotion.[5][11]The All Japan Nishikigoi Promotion Association, founded in Ojiya, Niigata, in January 1970, reported 269 domestic members and 219 overseas members across 27 countries and regions as of July 2025, and has run promotional activities in Singapore and Shanghai as well as an AI-assisted online world koi show.[4] The association's secretary-general has described international koi shows, including the All Japan Combined Nishikigoi Show, as central to expanding the global market, noting that the 2025 International Junior Koi Show drew participants from 53 countries and regions.[4]

Traceability and overseas markets

As Japanese koi exports expand, some overseas markets have seen non-Japanese carp sold alongside or in place of Japanese nishikigoi, prompting industry efforts to strengthen traceability and shared evaluation standards for authenticity.[5] According to the Niigata-based dealer Japan Koi Service, cited in a JETRO report, exports reach more than 20 countries and regions including Europe, the United States, Canada, Malaysia, Singapore and Taiwan, with agents established in Germany, Italy, the Netherlands and the United Arab Emirates.[5] The same report notes that live koi shipments are generally limited to about 48 hours in transit, meaning air transport dominates and direct-flight availability constrains which destinations are practical to serve.[4]

Disease and biosecurity across borders

International movement of koi has also spread disease risks. Koi herpesvirus (KHV) was first recorded in Israel in 1998 following large-scale mortalities of farmed carp and is now known to occur in more than 28 countries, including Great Britain, where it is a notifiable disease.[6] Some koi farms in Israel use a vaccine against KHV, developed at the Hebrew University of Jerusalem; Israel is described as the only country that vaccinates koi against the virus this way.[7] In 2002, an outbreak of spring viremia of carp at an ornamental koi farm in Kernersville, North Carolina, required complete depopulation of the ponds, after which some koi farmers in neighboring US states reportedly stopped importing fish for a time out of concern about infecting their own stocks.[7]

Common questions

When did koi keeping first spread outside Japan?
ZNA states its hobby movement became a national and international organization in 1968,[2] with its first US chapter following in Southern California, reported as July 1972 by ZNA Southern California or February 1973 according to ZNA America.[3][2]
What role did ZNA play in spreading koi worldwide?
Zen Nippon Airinkai, founded from Dr. Kuroki Takeo's Oita Airinkai Koi Club in 1962, grew into a nationwide Japanese association and then set up an International Division to manage overseas chapters, exchange judges and promote nishikigoi globally.[1][9]
Where does the US rank among destinations for Japanese koi exports?
In 2024, the United States was the top destination for Japanese nishikigoi exports by value, accounting for about 16.5% of the total, ahead of Vietnam and Hong Kong.[4]
Why is Israel significant in the history of koi disease?
Koi herpesvirus (KHV) was first recorded in Israel in 1998 after mass mortalities in farmed carp, and some Israeli koi farms later used a locally developed vaccine against the virus, a practice not widely reported elsewhere.[6][7]
Is non-Japanese koi now common in overseas markets?
Yes; a 2026 JETRO report notes that koi from countries such as China and parts of Southeast Asia increasingly circulate in overseas markets, prompting Japanese industry bodies to push traceability and certification to distinguish Japanese-origin nishikigoi.[5]

References

  1. ^ History of Zen Nippon Airinkai | Zen Nippon Airinkai. Zen Nippon Airinkai. zna.jp/en/history-2/. Retrieved November 2026.
  2. ^ About. Zen Nippon Airinkai America — znaamerica.com. znaamerica.com/about. Retrieved November 2026.
  3. ^ What is Zen Nippon Airinkai? – Zen Nippon Arinkai Southern California. znasocal.org. znasocal.org/a-homepage-section/. Retrieved November 2026.
  4. ^ 日本の伝統文化・美意識の象徴、錦鯉を世界へ発信 | 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/2025/ee7cac04ab0dfd5d.html. Retrieved November 2026.
  5. ^ 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.
  6. ^ Koi Herpesvirus (KHV) - GOV.UK. UK Government. gov.uk/government/publications/koi-herpesvirus-khv/koi-herpesvirus-…. Retrieved November 2026.
  7. ^ Koi (Wikipedia). Wikipedia. en.wikipedia.org/wiki/Koi. Retrieved November 2026.
  8. ^ History of the All Japan Nishikigoi Promotion Association - All Japan Nishikigoi Promotion Association. All Japan Nishikigoi Promotion Association. jnpa.info/en/about/history/. Retrieved November 2026.
  9. ^ Works and Activities of the ZNA Divisions | Zen Nippon Airinkai. Zen Nippon Airinkai. zna.jp/en/division-2/. Retrieved November 2026.
  10. ^ UF/IFAS EDIS FA124: The Ornamental Fish Trade. University of Florida IFAS Extension (EDIS). ask.ifas.ufl.edu/publication/FA124. Retrieved November 2026.
  11. ^ 2025 agricultural, forestry and fishery export results (MAFF, Feb 2026). Ministry of Agriculture, Forestry and Fisheries (Japan). maff.go.jp/j/press/yusyutu_kokusai/kikaku/attach/pdf/260203-1.pdf. Retrieved November 2026.