日本国 Nippon-koku
Timeline: The Era of Relative Peace

OTL equivalent: Japan plus Kuril Islands and Sakhalin Islands
Flag of Japan Imperial Seal of Japan
Flag Coat of Arms
Japan (orthographic projection)
Location of Japan
Anthem ""Kimigayo"


(and largest city)
Other cities Osaka, Yokohama, Kyoto, Nagasaki, Naha
Language Japanese
Ethnic Groups
  others Ainu, Korean, Chinese, Filipino, American
Demonym Japanese
Government Unitary parliamentary constitutional monarchy
  legislature Diet
Emperor Akihito
Japan is an island country located in East Asia, sharing maritime borders with the Republic of Korea, the Chinese Federated Union, Taiwan, and Russia. The country is one of the richest in Asia, as well as the world's second biggest economy next to the United States.


The Early 20th Century

In 1904, Japan defeated the Russian Empire in the Russo-Japanese War. In 1910, the Japanese Empire annexed the Korean peninsula. It was a member of the Allied powers during the First World War where the country attacked German possessions in the Pacific. By 1937, the country went to war with China again and invaded Manchuria. Relations with the West were already deteriorating at this point.

World War II

Japan was a member of the Axis Powers during the Second World War. After the Fall of France to Nazi Germany, Japan took possession of French Indochina. The Empire was subjected to an oil embargo enacted by the United States.

Cold War

After the war, Japan was devastated but quickly recovered from the damages. From 1945 to 1951, the United States military occupied Japan. And it was from this that Japan can no longer militarize, it's constitution rewritten in 1947 by the United States, and its emperor only now a symbolic head. The Self-Defense Forces were created as a result of majority of the U.S. forces being deployed to South Korea during the Korean War. By the 1960s and the 1970s, Japan became a rich country. The United States meanwhile, maintained their troops in the islands as a deterrence to both the Soviet Union, China, and North Korea. Japan was given a major non-NATO ally status of the United States prior to World War III.

World War III

Prior to war, the JSDF and the United States military forces were on constant high alert due to the Soviet presence in the Kuril and the Sakhalin islands. Though no direct military engagement occurred with the Soviets, U.S. and Japanese fighter jets would occasionally chase out Soviet aircraft outside Japan's airspace.

Upon China's entry to the war in January 1990, the JSDF, USMC, and USAF braised in for an invasion. The Japan Maritime Self-Defense Force clashed with the PLA in the East China Sea. Subsequently, Japan and South Korea put aside their differences and fought the common enemy in the region. While attacked by China, the JSDF managed to send a few of its forces to the Korean peninsula, the first time since 1945.

China launched air attacks on the U.S. bases in the country. Additionally, cities along the eastern coastline were shelled by the PLAN. The Soviet Union launched their first air attacks on the island of Hokkaido, eventually occupying the island on the process. Upon the invasion of Taiwan to the PRC, the Chinese then invaded Okinawa with a force of 4000 men. A joint USMC-JSDF operation successfully repelled the Chinese invasion but casualties were high on both sides. In the north, the U.S. and Self Defense Forces counterattacked the Soviets in Hokkaido. Since Japan and the U.S. was at war, this made the reclamation of Kuril and Sakhalin fair game. Casualties were high of both sides but unexpectedly, the Soviets withdrew all of a sudden. This surprised the U.S. and Japanese troops who promptly recaptured the island.

Recent Times

Japan's economy bloomed again after the Third World War. Post-war Japan was marked with technological advances such as robotics, video game consoles, automobiles, etc. It would also be one of the richest countries in Asia. In 2005, the country formally apologized and compensated to the nations affected by its wartime past. This included the Chinese Federated Union and Korea, both of which were notably anti-Japanese prior to the apology. As a result of this apology, relations between China and Korea have been cordial and better compared to the past years.

On March 11, 2011, a 9.0 magnitude quake struck off the coast of Tohoku. This was followed by a tsunami. This caused severe damages to the coastal towns as well as damaging the nearby Tohoku Power Plant - which released radiation to the coast. The international community quickly responded and sent aid to Japan.

In 2017, Japan, Taiwan, and the Chinese Federated Union are negotiating a possible joint-administration of the Senkaku (Diayu) Islands in the East China Sea.

Government and Politics





Japan's armed forces are called the Japan Self Defense Force (JSDF). Article 9 of the Japanese constitution states that the SDF cannot be used for conquest and can only fight in a defensive war. However, there is a debate within the Diet to let the SDF respond to allies, particularly the US, the Philippines, and the ANZ, in a form of collective self defense in the face of a belligerent nation or a campaign against a terrorist organization.

The following are the branches of the Self Defense Force:

  • Japan Ground Self Defense Force
  • Japan Maritime Self Defense Force
  • Japan Air Self Defense Force

Foreign Relations

Japan has good relations with the United States, the United Kingdom, Australia, New Zealand, Taiwan, the Philippines, Brunei, and other numerous states around the world. Relations with Korea and China has also warmed in the recent years since the nation formally apologized for its war crimes caused during World War II on August 15, 2005; on the 60th anniversary on VJ Day. Japan promised to provide reparations to the countries it affected during the war, which continues to this day. Nonetheless, some challenges for the relations with Taiwan, Korea, and China are some territorial disputes in the East China Sea. The nations involved are currently discussing how to resolve these issues peacefully.