Japan was originally inhabited by the Ainu people but the first outsiders to reach Japan were Portugal traders and missionaries. There is no single person that descivered it though.
Japan opens two ports for US trade.
Tokyo was founded in 1457 under the name Edo and was a quiet town with a small population. This changed in 1603 when the Tokugawa Shogunate moved the seat of government to Edo. As a result the population increased substantially. The city was renamed Tokyo, meaning “Eastern Capital,” to reflect the change.
The Japanese invasion of Manchuria began on September 19, 1931, when Manchuria was invaded by the Kwantung Army of the Empire of Japan immediately following the Mukden Incident. The Japanese established a puppet state, called Manchukuo, and their occupation lasted until the end of World War II.
Japan Launches Attack on China
Most historians place the beginning of the Second Sino-Japanese War on July 7, 1937 at the Marco Polo Bridge Incident, when a crucial access point to Beijing was assaulted by the Imperial Japanese Army (IJA). Because the Chinese defenders were the poorly equipped infantry divisions of the former Northwest Army, the Japanese easily captured Beiping and Tianjin.
Invasion of China Ends
With Japanese casualties and costs mounting, the Imperial General Headquarters decided to retaliate by ordering the air force of the navy and the army to launch the war's first massive air raids on civilian targets in the provisional capital of Chongqing and nearly every major city in unoccupied China, leaving millions dead, injured and homeless.
Japan Enters WWII
Japan Enters WWII
US and Britan declare war on Japan
Britain and the US declared war on Japan
The Japanese, who were alredy waging war against the chinese, attacked the US pacific fleet at Pearl Harbour, Hawaii, as a preliminary to taking British, French, and Dutch colonies in South East Asia.