noun, noun or participle which takes 'suru', intransitive verb
reign; tenure in office
Used for monarchs, popes, and other high-ranking officials to indicate the period during which they hold their position.
エリザベス女王の在位期間は70年を超えた。
Queen Elizabeth's reign exceeded 70 years.
現在の天皇は
The current emperor ascended the throne in 2019.