"Kimigayo" is the national anthem of Japan. The lyrics are from a waka poem written by an unnamed author in the Heian period (794–1185), and the current melody was chosen in 1880, replacing an unpopular melody composed by John William Fenton in 1869. While the title "Kimigayo" is usually translated as "His Imperial Majesty's Reign", no official translation of the title or lyrics have been established in law.

A national anthem is a patriotic musical composition symbolizing and evoking eulogies of the history and traditions of a country or nation. The majority of national anthems are marches or hymns in style. American, Central Asian, and European nations tend towards more ornate and operatic pieces, while those in the Middle East, Oceania, Africa, and the Caribbean use a more simplistic fanfare. Some countries that are devolved into multiple constituent states have their own official musical compositions for them ; their constituencies' songs are sometimes referred to as national anthems even though they are not sovereign states.