日皇明仁已在东京登基。

Emperor Akihito of Japan has been enthroned in Tokyo.

《柯林斯英汉双解大词典》

例如，公元7世纪的Palenque国王帕斯卡下令创作的一篇碑文中则预计4772年10月15日是他的登基纪念日。

For instance, an inscription commissioned in the 7th century A.D. by King Pacal of Palenque predicts that an anniversary of his accession would be commemorated on Oct. 15, 4772.

youdao

朕今年也有理由静下心来自省，在西敏寺，回想60年前的加冕日里，朕在这座宏伟教堂中立下的登基誓言。

I myself had cause to reflect this year, at Westminster Abbey, on my own pledge of service made in that great church on Coronation Day 60 years earlier.

youdao