On Thursday, the Government of Japan announced that Their Majesties King Philippe and Queen Mathilde of the Belgians will host an incoming state visit from Their Imperial Majesties Emperor Naruhito and Empress Masako of Japan in mid to late June 2026.

The visit will take place on the occasion of the 160th anniversary of the establishment of diplomatic relations between the Kingdom of Belgium and Japan.

In a statement issued by the Chief Cabinet Secretary of the Government of Japan, Minoru Kihara, noted that exchanges between the Imperial Family of Japan and the Royal Family of Belgium have long played an important role in strengthening the close and friendly relations between the two countries. He added that preparations for the visit are proceeding following repeated invitations extended by the Government of the Kingdom of Belgium.

Diplomatic relations between the Kingdom of Belgium and Japan date back to  August 1st, 1866, when the two countries signed the Treaty of Amity, Commerce and Navigation. The agreement was concluded during the final years of the Tokugawa period, at a time when Japan was establishing formal diplomatic and commercial relations with a number of Western countries following the end of its long period of relative isolation.

The Kingdom of Belgium was among the early European countries to establish sustained diplomatic ties with Japan. In the decades that followed, relations between the two countries expanded through diplomacy, trade, and cultural exchange.

In October 1921, His Imperial Highness Crown Prince Hirohito of Japan, the future Emperor Hirohito, visited the Kingdom of Belgium during his tour of Europe. During the visit, the Crown Prince was received by King Albert I and Queen Elisabeth of the Belgians.

Exchanges between the Royal Family of Belgium and the Imperial Family of Japan have continued as part of the broader diplomatic relationship between the two countries. The forthcoming visit by Emperor Naruhito and Empress Masako will mark the latest chapter in those relations.