noun
establishment of diplomatic relations
Formal term used in political and international contexts.
両国は国交樹立から50周年を迎えた。
The two countries marked the 50th anniversary of the establishment of diplomatic relations.
国交樹立に向けた交渉が続いている。
Negotiations toward the establishment of diplomatic relations are ongoing.
Compound of 国交 (diplomatic relations) and 樹立 (establishment).