The Grand Duchy of Luxembourg signed its official participation contract for GREEN×EXPO 2027 at the Embassy of Luxembourg in Tokyo on 26 February 2026. The GREEN×EXPO Association (officially the 2027 International Horticultural Expo Association, a public interest incorporated association) announced the signing on 6 April 2026, the same day it announced India’s. Luxembourg is also on the list of participating countries and organisations that the Association had published as of 9 September 2026. The Yokohama expo’s theme is “Creating the Landscape of Tomorrow’s Happiness.”
Basic facts
Japan’s Ministry of Foreign Affairs gives the following basic data for Luxembourg (as of 31 July 2026).
| Item | Detail |
|---|---|
| Area | 2,586 square kilometres |
| Population | 691,000 (January 2026, Luxembourg’s national statistics institute STATEC) |
| Capital | Luxembourg City |
| Languages | Luxembourgish, French, German |
| Religion | 48% of the population belongs to a specific denomination, of which 85% is Catholic (European Values Study, 2020–21) |
| Government | Constitutional monarchy; head of state is Grand Duke Guillaume (enthroned October 2025) |
| Japanese residents in Luxembourg | 848 (October 2025, MOFA consular statistics) |
| Luxembourgers resident in Japan | 90 (June 2025, Ministry of Justice statistics) |
| Relations with Japan | 2027 marks the 100th anniversary of diplomatic relations |
| High-level visits | Princess Akiko visited in March 2026, and Minister for Internal Affairs and Communications Hayashi (also head of the Japan–Luxembourg Friendship Parliamentary League) visited in May 2026 |
MOFA’s historical outline notes that Luxembourg was a founding member of the European Coal and Steel Community, the forerunner of the European Union, and has been an active promoter of European integration.
Official exhibit information
According to the Association’s announcement, the contract was signed at the Embassy of Luxembourg in Tokyo on 26 February 2026. The signatories were Secretary General Masato Kawamura of the GREEN×EXPO Association and Ambassador Michel Reisch, Luxembourg’s Ambassador Extraordinary and Plenipotentiary to Japan, who has been appointed as the country’s Commissioner General of Section. Ambassador Kazuhiko Koshikawa, the Japanese Commissioner General of the Expo, countersigned it. A Commissioner General of Section represents an “official participant” (a foreign government or international organisation that has accepted Japan’s invitation to take part) at the Expo, while the Japanese Commissioner General represents the Japanese government.
The Association describes the exhibit’s direction as presenting the horticultural heritage Luxembourg built as a rose-exporting country in the 19th century, and showing the importance of keeping people connected with nature as ties to the digital world deepen. The announcement closes by saying Luxembourg’s participation will be an occasion to celebrate the 100th anniversary of diplomatic relations with Japan. The exhibit’s footprint and pavilion details had not been announced as of September 2026.
A cultural primer
Luxembourg’s rose-growing history is covered on Visit Luxembourg, the country’s official tourism board site. A rose garden called “Rousegaart op de Rondellen,” on the Plateau du Saint-Esprit in Luxembourg City, marks the golden age at the end of the 19th century. On the tourism board’s site it is Luxembourg City that was known at the time for shipping roses worldwide, the same period as the 19th-century rose heritage the Association attributes to the country. Nearby Munsbach also has a rose garden with both traditional and modern varieties.
Besides roses, the same site covers the Moselle valley wine country, where viticulture dates back to Roman times. According to the site, some 59 wine estates make wine and crémant from grape varieties such as Riesling, Pinots, Gewürztraminer and Auxerrois. A younger generation of winemakers is experimenting with new approaches, from drone-based pest management to ageing wine in buried clay amphorae. The site’s homepage also lists other natural attractions, including the Grevenmacher butterfly garden and the fairytale-themed Parc Merveilleux in Bettembourg.
The full list of participating countries is on our feature page “Participating countries”. Dates, access, tickets and places to stay are in our “GREEN×EXPO 2027 guide”.
Correction (6 October 2026): In “A cultural primer” and the FAQ we placed the rose garden “Rousegaart op de Rondellen” in the Kirchberg district; Visit Luxembourg gives its location as the Plateau du Saint-Esprit.
Correction (19 October 2026): The cover photo caption dated the signing ceremony to April 2026; the contract was signed on 26 February 2026 (6 April was the date of the Association’s announcement).