noun
high commissioner
Official title for a senior diplomatic representative, often heading a commission or office.
国連高等弁務官が難民問題について声明を発表した。
The UN High Commissioner issued a statement on the refugee issue.
Compound of 高等 (high-grade, high-level) + 弁務官 (commissioner, diplomatic agent). The term is a direct translation of the English 'high commissioner'.