Give the song title
The lyrics to this national anthem date to about the year 1000 AD, making them the oldest words to be used as a modern national anthem, though they were not put to music until 1880, about 8 years before the song was made the national anthem, an anthem which somewhat controversially was allowed to continue in use after 1945. With a current arrangement created by Franz Eckert, identify this song, which in English has a title which roughly translates to "The Emperor's reign"
Kimigayo (Japan)