"Japan was said to around 400 A.D when the Yamato clan finally over-powered the rest of the clans wanting power. And, the first westerners to find the country was a Portuguese sailer who accidently laned in their port."
The above is not an answer. The answer is often confused because common references contain popular 'myth' instead of historic hypothesis. Encyclopaedias tell us that Japan was apparently founded in 660B.C. by Emperor Jimmu. However, this date is not agreed upon by modern historians and is not supported by evidence in Archaeology or the histories of Korea or China, let alone Japan itself.
Modern historian Kume Kunitake estimates that Japan's actual founding date was about six hundred years after 660B.C., in 25B.C. His hypothesis is based on facts rather than myth.
If you have access to a public library, look into Japanese Historians and The National Myths, 1960-1945: The Age of the Gods and Emperor Jinmu, John S. Brownlee UBC Press 1997 for further information.
Japanese legend maintains that Japan was founded in 600 BC by the Emperor Jimmu.
japan
Japan
Japan
Tokyo, Japan
I believe in 1955
The first and oldest Buddhist temple in Japan was founded in 593.
Sega was first founded in 1940 as Standard Games.In 1952 however, the company moved to Japan, registered as "SErvice GAmes of Japan".
Fuji heavy industries- Japan
it was founded in Osaka, Japan in 1954
the yamato clan accidentally landed on the port.
600BC