Japan and Mongolia have agreed to promptly begin negotiations on an income tax treaty, with preliminary consultations on a social security agreement to follow.
Japan and Mongolia agreed to promptly commence negotiations for an income tax treaty when their prime ministers met on 29 September 2026, according to a release from Japan’s Ministry of Foreign Affairs. The two sides also agreed to hold preliminary consultations on a social security agreement in the future.
The agreement came during a summit between Japanese Prime Minister Sanae Takaichi and her Mongolian counterpart, Nyam-Osor Uchral, who is on an official working visit to Japan. The leaders said the move would help develop economic cooperation, ahead of the 55th anniversary of diplomatic relations next year.
Any resulting treaty or agreement would be a new arrangement between the two countries. It must be finalised, signed and ratified before entering into force.
