0
The question is difficult to answer quickly, and perusing one or more works on Japanese history would be the best route to providing yourself with a satisfactory answer.
The Japanese archipelago has been inhabited for tens of thousands of years, and cultural or political groupings that would eventually become the various Japans date from preliterate times.
In its present form, Japan can be dated to perhaps the late 1860s, when the final civil wars ended, but Japan expanded in one form or another greatly in the mid-20th century (ca. 1931) with the creation of a puppet (and effectively vasal) state in northeastern China; others would hold that the earlier effective annexation of Korea would consititute the beginning of expansion.
Japan became much smaller after its defeat in the Second World War and did not assume its present form until 1972, when Okinawa was returned to the administrative control of Japan.
Many Japanese would hope for a further expansion of the national territory from its present boundaries with the return of the "northern territories," siezed by the Soviet Union during the Second World War and presently controlled by Russia.
What else can I help you with?
When was Seismological Society of Japan created?
Seismological Society of Japan was created in 1880.
When was Rises Over Japan created?
Rises Over Japan was created in 1985-03.
When was Japan Air Commuter created?
Japan Air Commuter was created on 1983-07-01.
When was Thirty-Second Army - Japan - created?
Thirty-Second Army - Japan - was created in 1944.
When was Japan Transocean Air created?
Japan Transocean Air was created on 1967-06-20.
When was My Japan created?
My Japan was created in 1945.
When was Japan Expo created?
Japan Expo was created in 1999.
When was Japan Today created?
Japan Today was created in 2000.
When was Empire of Japan created?
Empire of Japan was created in 1868.
When was The Japan EP created?
The Japan EP was created in 2000.
When was Occupation of Japan created?
Occupation of Japan was created in 1945.
When was Nickelodeon - Japan - created?
Nickelodeon - Japan - was created in 1998.
When was The Japan Album created?
The Japan Album was created in 1999.
When was Alice Japan created?
Alice Japan was created in 1986.
When was The Japan Times created?
The Japan Times was created in 1867.
When was The Temptations in Japan created?
The Temptations in Japan was created in 1973.
When was Big Japan created?
Big Japan was created in 2005.
