As so, the lyrics was started written on 10th century or earlier. The lyrics of this anthem was the oldest lyrics in the world. In 1870, the anthem was adopted. Same lyrics, but different music. In 1880, they decided to change the anthem. And the music and lyrics arranged correctly. During the World War II, Japanese Empire has invaded several countries. In 1945 that the day USA nuked Japan, it is likely to be replaced into the USA anthem and later restored in 1952 as so on. It is also the second shortest anthem in the world that still exist. Measuring 11 bars in total. An national anthem of Japan. Lyrics: Kimi ga Yo wa Chiyo ni Yachiyo ni Sazare-ishi no Iwao to narite Koke no musu made