noun
Universal Postal Union
Official name of the United Nations specialized agency for international postal services. Often abbreviated as UPU.
万国郵便連合は国際郵便のルールを定めている。
The Universal Postal Union establishes the rules for international mail.
Compound of 万国 (bankoku, 'all nations') + 郵便 (yūbin, 'postal service') + 連合 (rengō, 'union'), a direct translation of the English name 'Universal Postal Union'.