The answer to this question is 1931.
Advantages:
The island geography means that Japan was fairly isolated and developed a distinct culture.
The threat of invasion was very less considering the fact that seas surrounding Japan are aggressive in nature.
The volcanic nature of Japanese islands is responsible for extremely fertile soil which makes it an excellent agrarian producer.
Surrounding seas enable a fishing economy to flourish.
The streamlined nature of Japanese islands and the proximity to the ocean ensure that there are no water shortages in the country.
The climate created by the relief, winds, currents etc make it an excellent tourist attraction.
Japan is rich in natural sceneries and the aesthetically pleasing culture adds a flair for tourists to admire.
Disadvantages:
Japanese islands are extremely mountainous and relief makes it harder for development on most of the country's landmass.
Volcanic mountains are common and eruptions can hit at any time.
Earthquakes are extremely common and cities are rebuilt almost every few years.
Winters can get extremely cold and unbearable.
The extermination camps were used to hold jews until they are to be gassed. This is known as the Holocaust.
It was one of the longest-lived colonial powers, lasting for almost six centuries from when Ceuta was captured in 1415, until Macau (now China) was handed-over in 1999.
The reason why <span> President Polk support the U.S. acquisition of both Texas and the entire Oregon Territory was: He did not want to fight Britain.
During that time, the british empire still had a strong influence over the Washington States. To prevented clash with Britain, he compromised and obtained Oregon instead.</span>
