Europe accounts for seven of the countries that have confirmed participation in GREEN×EXPO 2027: Azerbaijan, Italy, the UK, Croatia, Spain, Serbia and Luxembourg. All seven appear on the participation list published by the GREEN×EXPO Association (as of 9 September 2026) and on the Ministry of Foreign Affairs list (as of 7 September 2026). All seven have now signed official participation contracts with the Association.
GREEN×EXPO 2027, the 2027 International Horticultural Expo, runs from 19 March to 26 September 2027 at a site in Yokohama’s Seya and Asahi wards. The table below gives each country’s official participation contract status and the capital, population and language from the Ministry of Foreign Affairs’ basic data, current as of September 2026. Only Italy, the UK and Luxembourg have announced the general direction of their exhibits, covered after each table; the other four have no exhibit information as of September 2026.
Western Europe
| Country | Official participation contract | Capital | Population | Language |
|---|---|---|---|---|
| The United Kingdom | Signed 30 Jul 2026 (announced the following day, at the British Embassy in Tokyo) | London (population about 9.09 million, 2024) | 68.27 million (2023, UK Office for National Statistics) | English |
| Luxembourg | Signed 26 Feb 2026 (announced 6 Apr 2026, same day as India; at the Embassy of Luxembourg in Tokyo) | Luxembourg City | 691,000 (January 2026) | Luxembourgish, French, German |
The UK, drawing on its long experience in horticulture and landscape design, plans to recreate a British garden in Yokohama. It will also introduce innovations in sustainable technology.
Luxembourg’s exhibit will introduce the horticultural heritage the country built as a rose exporter in the 19th century. It will also carry the message that the human connection to nature matters more as life becomes increasingly digital. Luxembourg is taking part in the year of the 100th anniversary of its diplomatic relations with Japan.
Southern Europe
| Country | Official participation contract | Capital | Population | Language |
|---|---|---|---|---|
| Italy | Signed 9 Jul 2026 (announced 13 Jul, at the Italian Embassy in Tokyo) | Rome | about 58.97 million (2024, IMF) | Italian |
| Spain | Signed 31 Jul 2026 (announced 25 Aug 2026) | Madrid (population about 3.51 million) | about 49.72 million (2025, IMF) | Spanish (Castilian) |
Italy will carry over some of the architecture and exhibit elements from its well-received pavilion at Expo 2025 Osaka, Kansai. The exhibit theme is “Italy designing the harmony of nature, tradition and innovation.” The Association has also framed this as a demonstration of Italy’s commitment to the circular economy and sustainability. We also cover Italy in a dedicated article, currently available in Japanese only.
Spain has not announced its exhibit for GREEN×EXPO 2027 as of September 2026. During Expo 2025 Osaka, Kansai, Spanish cabinet ministers, including its Minister of Industry and Tourism, visited Japan as guests for Spain’s national day.
Central and Eastern Europe, and the Balkans
| Country | Official participation contract | Capital | Population | Language |
|---|---|---|---|---|
| Croatia | Signed 8 Jul 2026 (announced 21 Jul 2026) | Zagreb | 3.855 million (2022, Croatian Bureau of Statistics) | Croatian (official) |
| Serbia | Association announced 14 Aug 2026 (announcement); signing date not made public | Belgrade (population about 1.68 million) | about 6.59 million (2024, World Bank) | Serbian (official) |
Croatia and Serbia have likewise not announced their exhibits as of September 2026. Prime Minister Plenković of Croatia visited Japan in September 2025, during Expo 2025 Osaka, Kansai.
President Vučić of Serbia visited Japan in September 2025 for Serbia’s national day at Expo 2025 Osaka, Kansai.
The Caucasus
| Country | Official participation contract | Capital | Population | Language |
|---|---|---|---|---|
| Azerbaijan | Signed 12 Nov 2025 (announced 9 Jan 2026) | Baku | 10.4 million (2025, UNFPA) | Azerbaijani (official) |
For the other participating countries and organisations, see our participating countries guide. Dates, getting there, tickets and places to stay are on our GREEN×EXPO 2027 page.