Japanese colonial empire

Between 1895 and 1945, Taiwan, including the Pescadores, was a colony of the Empire of Japan; following the defeat of Qing China in the First Sino-Japanese War, it ceded Taiwan to Japan under the terms of the Treaty of Shimonoseki. The short-lived Republic of Formosa resistance movement was quickly suppressed by the Japanese military. The fall of Tainan ended organized resistance to Japanese occupation and inaugurated five decades of Japanese rule.

Since Taiwan was Japan's first overseas colony, the central and colonial governments turned their efforts into making the island a "model colony".[7] These resulted in the modernization of the island's economy, infrastructure, industry, public works, and assimilation of its population.

In 1945, after the defeat of the Empire of Japan in World War II, Taiwan was placed under the control of the Republic of China with the signing of the Japanese Instrument of Surrender.[8] The experience of Japanese rule, Kuomintang rule, and the February 28 Incident (1947) continues to affect issues such as Retrocession Day, national and ethnic identity, and the Taiwan independence movement.

In the late 19th and early 20th centuries, various Western countries competed for influence, trade, and territory in East Asia, and Japan sought to join these modern colonial powers. The newly modernized Meiji government of Japan turned to Korea, then in the sphere of influence of China's Qing dynasty. The Japanese government initially sought to separate Korea from Qing and make Korea a Japanese satellite to further their security and national interests.[9]

In January 1876, Japan employed gunboat diplomacy to pressure Korea, under the Joseon Dynasty, to sign the Japan–Korea Treaty of 1876, which granted extraterritorial rights to Japanese citizens and opened three Korean ports to Japanese trade. The rights granted to Japan under this unequal treaty,[10] were similar to those granted to western powers in Japan following the visit of Commodore Perry.[10] Japanese involvement in Korea increased during the 1890s, a period of political upheaval.

Korea was occupied and declared a Japanese protectorate following the Japan–Korea Treaty of 1905; it was annexed in 1910 through the annexation treaty. Korea was renamed Chōsen and remained a part of the Empire of Japan for 35 years; from August 22, 1910, until August 15, 1945, upon the surrender of Japan in the Pacific War. The 1905 and 1910 treaties were officially declared "null and void" by both Japan and South Korea in 1965.

During the 19th century, Russia and Japan vied for control of Sakhalin Island. Following the Meiji Restoration in 1868, Japanese settlers were sent to southern Sakhalin to exploit its resources.[11] Japan ceded southern Sakhalin to Russia in 1875 in exchange for the Kuril Islands under the Treaty of Saint Petersburg. After achieving victory in the Russo-Japanese War, Japan was ceded southern Sakhalin under the terms of the Treaty of Portsmouth. Japan established its colonial government in 1907, whereupon South Sakhalin was renamed Karafuto Prefecture.

Japanese and Korean migrants to the colony developed the fishing, forestry and mining industries. Taking advantage of the Russian Civil War, the Imperial Japanese Army occupied northern Sakhalin between 1920 and 1925;[12] afterwards Japan retained favorable coal and oil concessions therein until 1944. In 1943, Karafuto was elevated to naichi status.

The Soviet Union invaded and annexed Karafuto at the end of World War II.[13]

Following the outbreak of World War I in 1914, the Empire of Japan declared war on the German Empire and quickly seized the possessions of the German colonial empire in the Pacific Ocean (the Northern Mariana Islands, the Caroline Islands and the Marshall Islands) with virtually no resistance. After the end of the war the Treaty of Versailles formally recognized the Japanese occupation of former German colonies in Micronesia north of the equator. A League of Nations mandate put them under the Japanese administration known as the Nan'yō Agency or South Seas Agency (南洋廳, Nan'yō Chō) and the post of Governor of the South Seas Mandate was created.[14]

The main significance of the South Seas Mandate to Japan was its strategic location, which dominated the sea lanes across the Pacific Ocean and provided convenient provisioning locations for ships. During the 1930s, the Imperial Japanese Navy began construction of airfields, fortifications, ports, and other military projects on the South Seas Mandate islands, viewing them as "unsinkable aircraft carriers" with a critical role to play in the defense of the Japanese home islands against potential invasion by the United States. The islands became important staging grounds for Japanese air and naval offensives during the Pacific War but were lost to American military action between 1943 and 1945. The League of Nations mandate was formally revoked by the United Nations on July 18, 1947, according to Security Council Resolution 21, making the United States responsible for administration of the islands under the terms of a United Nations trusteeship agreement which established the Trust Territory of the Pacific Islands.

After emerging victorious against Qing China in the First Sino-Japanese War, Japan was ceded the southern part of the Liaodong Peninsula under the terms of the Treaty of Shimonoseki. Diplomatic pressure from Russia, Germany, and France forced Japan to quickly relinquish the territory, which allowed Russia to lease it from China in 1898. In 1905, Russia was defeated in the Russo-Japanese War; under the terms of the Treaty of Portsmouth, Russia returned the Liaodong Peninsula to Japan, whereupon it was renamed the Kwantung Leased Territory. A governor and an Imperial Japanese Army garrison were established, the latter becoming the Kwantung Army in 1919.

As a result of Russia's defeat, it also lost influence in Manchuria, which allowed Japan to take its place. In 1906, Japan laid the South Manchuria Railway to Ryojun. Japan temporarily occupied Russian Manchuria in 1918, but returned it to in Soviet Union in 1922. Manchuria came under the control of the Chinese warlord Zhang Zuolin during the warlord period in China. He initially had Japanese backing, but the Kwantung Army found him too independent; he was assassinated in 1928.

The Japanese invasion of Manchuria took place in 1931 following the Mukden Incident, a staged event engineered by Japanese military personnel from the Kwantung Army as a pretext for invasion.[15][16][17] The region was subsequently separated from Chinese control and the Japanese-aligned puppet state of Manchukuo was created.[18] The last Emperor of China, Puyi, was installed as head of state in 1932, and two years later he was declared Emperor of Manchukuo. The city of Changchun was renamed Hsinking and became the capital of Manchukuo. An imperial palace was specially built for the emperor. He was, however, nothing more than a figurehead and real authority rested in the hands of the Japanese military officials. The Manchu ministers all served as front-men for their Japanese vice-ministers, who made all decisions. Anti-Japanese Volunteer Armies were organized by the Chinese in Manchuria and the pacification of Manchukuo required a war lasting several years.

During the 1930s the Japanese colonized Manchukuo. With Japanese investment and rich natural resources, the economy of Manchukuo experienced rapid economic growth. Manchukuo's industrial system became one of the most advanced, making it one of the industrial powerhouses in the region.[19] Manchukuo's steel production exceeded Japan's in the late 1930s. The Japanese Army initially sponsored a policy of forced industrialization modeled after the Five Year Plan in the Soviet Union[20] but subsequently private capital was used in a very strongly state-directed economy. There was progress in the area's social systems and many Manchurian cities were modernized. Manchukuo issued banknotes and postal stamps, and several independent banks were founded. The Chinese Eastern Railway was bought from the Soviet Union In 1935. Traditional lands were taken and redistributed to Japanese farmers with local farmers relocated and forced into collective farming units over smaller areas of land.

During this period Manchukuo was used as a base from which to invade China. In the summer of 1939, a border dispute between Manchukuo and the Mongolian People's Republic resulted in the Battle of Khalkhin Gol. During this battle, a combined Soviet Army and Mongolian force defeated the Japanese Kwantung Army (Kantōgun) supported by limited Manchukuoan forces. The Soviet Union declared war on Japan on 8 August 1945 under the agreement at the Yalta Conference and invaded Manchukuo from Russian Manchuria and Mongolia. This was called Manchurian Strategic Offensive Operation. The Army of Manchukuo was defeated and the Emperor was captured by Soviet forces. Most of the 1.5  million Japanese who had been left in Manchukuo at the end of World War II were sent back to their homeland in 1946-1948 by U.S. Navy ships in the operation now known as the Japanese repatriation from Huludao.

• Kohima and Manipur (India)
• Dornod (Khalkhin Gol, Mongolia)
• Midway Atoll (United States)

• Air raids
  • Pearl Harbor (Hawai'i, United States)
  • Colombo and Trincomalee (Sri Lanka)
  • Kolkata (India)
  • Air raids on Australia, including:
    • Broome (Western Australia, Australia)
    • Darwin (Northern Territory, Australia)
    • Townsville (Queensland, Australia)
  • Dutch Harbor (Alaska, United States)
  • Lookout Air Raids (Oregon, United States)
• Naval bombardment by submarine
  • British Columbia (Canada)
  • Santa Barbara (California, United States)
  • Fort Stevens (Oregon, United States)
  • Newcastle (New South Wales, Australia)
  • Gregory (Western Australia, Australia)
• Midget sub attack
  • Sydney (New South Wales, Australia)
  • Diego Suarez (Madagascar)