Kofun of Emperor Jinmu is located in Kashihara, Nara Prefecture. The archaeological name of Jinmu Tenno Ryo is Unebiyamanoushitoranosuminomisasagi, or Misanzai Jibuden Kofun.
Emperor Jinmu passed away at the age of 137 in Kojiki, and 127 in Nihonshoki. The legend said that he was buried at the north side of Mt. Unebi.
Emperor Jinmu is the descendant of Amaterasu Omikami, the main god of Japanese myth. The family lived at Takachio of Hyuga. When he was 45 years old, he decided to expand the land to the east. Because legend said, there is a beautiful land on the east that would be a great place to build a new capital.
His eastern expedition reached the land of Kawachi, current Osaka. However, local powerful family in Kawachi was strong and Emperor Jinmu was defeated once.
So he decided to travel to the southern Kii peninsula. To support him, Amaterasu Omikami gave divine sword and Yata crow for his guidance. His army entered the land of Nara. People in Nara supported Jinmu and finally he conquered the land around Nara and Kawachi.
He became Tenno, the Emperor at this place when he was 52 years old. He passed away when he was 127 and buried at Kashihara.
Year 1938 was the 2600 years anniversary of Japanese Empire.