Home 660 BC: National Foundation Day in Japan - Koichi Kamoshida/Getty Images byWorld Radios and News -11:06 PM 0 © Koichi Kamoshida/Getty Images Advertisement 660 BC: Japanese empire is established On this day in 660 BC the first Japanese emperor, Jimmu, is crowned and the Japanese empire is established. https://www.msn.com/en-us/news/world/today-in-history-february-11/ss-BBIDACb?fullscreen=true Share