Kuril Islands Dispute

The border contestation between the Russian Federation and Japan over the Kuril Islands.

So, What's the Issue?

The current border contestation between Japan and the Russian federation concerns the rightful ownership of Iturup, Kunashir, Shikotan, and the Habomai Islets. These four islands are the southernmost part of the Kuril Island Chain, which stretches northeast from Hokkaido, Japan to Kamchatka, Russia.

The issue over who retains sovereignty over these four islands stems from the events that transpired during World War II. In 1945, the U.S.S.R. declared war against Japan, and occupied the entirety of the Kuril Island chain.

Today, the Russian Federation still maintains sovereignty over this territory. Japan continues to contest the legitimacy of Russian sovereignty over the four, previously noted, southernmost islands.

Both Japan and Russia invoke their respective historical justifications as to why they have legitimate sovereignty over the four islands. The map below provides a short explanation of how the borders of these islands have been demarcated throughout history.


Let's Check Out Some History!

This interactive map will walk you through an objective overview of the Kuril Islands' history, including transfers in territory and various border demarcations.

Hover over the numbers and click "read more" to learn about what happened!


Since Russia's annexation of the Kuril's in World War II, Japan and Russia have continued to disagree over who holds legitimate sovereignty over Iturup, Kunashir, Shikotan, and the Habomai Islets. Click through the slide show below to witness the back and forth arguments between Japan (as represented by Rachel) and Russia (as represented by Lauren)!

J: We were here first!

Evidence of Japanese exploration and administration of the Kuril Islands dates back to as early as the fifteenth century ("Kuril Islands," New World Encyclopedia). This is centuries before the Russians began their own expeditions through the islands in the early eighteenth century (Pike).

Moreover, in 1644, an official map of Japan illustrated Japanese ownership of 39 large and small islands northeast of the Shiretoko peninsula and Cape Nosappu, including the Kuril Islands ("Kuril Islands," New World Encyclopedia). This map demonstrates that the islands are not just Japanese territory, but were actually an integral part of the country, well before the Russians decided to lay their own claim over the islands.

Japan's early claims over the islands by the Matsumae Clan played an important role in their development ("Northern Territories"). Because they established and developed this territory, the Kuril Islands are an inherent part of Japan and her history.

https://www.sanderusmaps.com/our-catalogue/antique-maps/asia/japan/old-antique-map-of-japan-and-korea-by-janssonius-j-19532

R: Actually, the Ainu were the first.

The Japanese profess, as currently seen on their Ministry of Foreign Affairs website, that the Kuril Islands are an "inherent" part of Japan that have "never been held by foreign countries" ("Northern territories").

This brazen statement is completely incorrect, as the first peoples of the islands were actually the Ainu ("Kuril Islands," Encyclopedia Brittanica). As the Japanese began to colonize the southernmost Kurils in the 17th century, these people were subsequently displaced (Jozuka, "Japan's 'Vanishing' Ainu"). Thus, these islands cannot be considered "inherently" Japanese, as they were populated by the Ainu for several centuries before (Graf, 12).

Furthermore, the Japanese were not the only peoples exploring these islands in the 17th century. At the same time, Russians were also assimilating the islands, from the 17th to 18th centuries (Graf, 11).

J: The legitimate divisions of territory throughout history acknowledge our rightful ownership.

In 1855, the Treaty of Shimoda assigned ownership of the four southernmost Kuril Islands to Japan, while Russia received the northern islands (Hara, 12). Both countries had joint control over Sakhalin Island. This treaty marks the first legitimate ownership over the four southern islands that is currently being disputed today.

In 1875, the Treaty of St. Petersburg established Japanese ownership of all territory in the Kuril Islands except for Sakhalin, which remained under Russian administration (Gorenburg, 1). By 1905, Japan also gained control of the southern half of Sakhalin Island with the Treaty of Portsmouth (Hara, 12).

These three official documents acknowledge Japan's legal and rightful claims to the Kuril Islands, especially the four southernmost islands. These islands have only ever been declared Russian territory after Russia broke the 1941 Neutrality Pact, making Russian ownership far less legitimate than that of Japan (Pike).

R: Those are not the only legitimate historical borders!

At the time of their making, the treaties of 1855, 1875, and 1905 did demarcate the legitimate border between Japan and Russia. They do not, however, set the modern status quo for demarcation after the events that transpired during World War II.

Due to several international agreements formed at the end of World War II, there are no legitimate territorial issues between Russia and Japan. The first of these agreements was the Cairo Declaration, which was the outcome of a meeting between the Allies in 1943 (Hara, 45). At this meeting, the Allies declared Japan should be stripped of all its islands in the pacific, and all other territories that she had taken through violence (Hara, 45).

Then in February, 1945, the leaders of the three great powers, Stalin, Churchill, and F.D.R., came together at the Yalta Conference (Graf, 17). At this conference, the Allies promised the U.S.S.R. possession of the entire Kuril Chain in exchange for entering into a Pacific war against Japan (Graf, 17). The Yalta Accords, signed by the U.S., Great Britain, and the U.S.S.R., ratified this agreement. Under articles 2a and 3, the accords declared that all of the U.S.S.R.'s former rights that Japan violated in their 1904 attack would be restored, including Sakhalin and the Kuril Islands (Hara, 45).

Following the Yalta Conference, the Potsdam Declaration of July 1945 further reinforced Russia's right to the Kurils (Hara, 45). In the Potsdam Declaration, it was stated that the terms of the Cairo agreement were to be carried out, and that Japanese sovereignty would only be limited to a select number of islands - the Kurils not namely included (Hara, 45).

Thus, following all of these international agreements, the Soviets entered into war in the Pacific against Japan on August 8, 1945 (Graf, 18). On August 18, the Soviets began occupying the Kuril Islands, and formally integrated them into the Soviet Union in 1947 (Graf, 18).

J: Those deals don't stand because they are the result of illegal pact violations!

In 1941, after years of border conflicts and violence, the Soviet Union and Japan established a Neutrality Pact (Trenin, 5).

However, in the summer of 1945, the Soviets were quick to violate this official agreement, when the Soviet Union attacked the Japanese forces in Manchuria and Sakhalin ("Kuril Islands," New World Encyclopedia). Within four days of Japan's inevitable defeat, the Red Army began invading and conquering the Kuril Island chain (Trenin, 5). This seize of territory was completely illegal considering the violation of the Soviet-Japanese Neutrality Pact, as well as the fact that Japan didn't officially surrender until September of that year (Hara, 16).

By 1947, the Kuril Islands were officially a part of the U.S.S.R even though the illegal integration of this territory was unjustified in the eyes of the Japanese (Pike).

R: Everything we did is legit, especially after the 1951 San Francisco Treaty!

Due to the Yalta Accords, the Cairo Declaration, and the Potsdam Agreement, the Soviet Union had a very legitimate backing to then annex the Kurils. Additionally, after World War II and the 1947 incorporation, the 1951 San Francisco Peace Conference further cemented the U.S.S.R.'s claim to the Kurils ("Kuril Islands Dispute"). Under article 2c of this treaty between the Allies and Japan, Japan renounced all rights and claims to Southern Sakhalin and the Kuril Islands ("Kuril Islands," New World Encyclopedia).

It was only years after this treaty, in effort to regain a portion of the lands they lost as a consequence of WWII, that Japan denounced what was ratified in the Peace Treaty, claiming that it does not refer to the four southern islands still in dispute today (Graf, 19). Japan claimed that in their view, the four southern islands had "'never been part of the Kuril Chain'" (19).

J: You didn't even sign the 1951 Treaty! No signature, no say.

At the conclusion of WWII, Japan signed the San Fransico Peace Treaty, in which they ceded southern Sakhalin and the Kuril Islands, but the beneficiary was not indicated in the treaty (Sacko). The Soviet Union, upset that the treaty did not legitimately grant them ownership of the islands, refused to sign and rejected these terms (Pike).

Furthermore, the Treaty never explicitly defines, lists, or mentions Kunashiri, Shikotan and Habomais Islands (Trenin, 5). Based on this treaty, the Soviet Union does not have any legitimate guarantee of sovereignty over the southern Kuril Islands in question, nor has Japan lost all of its claim over them.

Therefore, based on the truly legitimate demarcations of territory laid out in earlier treaties, Japan's claim over the southern four islands is still legally supported.

R: We tried to negotiate in 1956, but you messed things up.

In 1956, after the Soviet Union incorporated the Kuril Islands as a legal act of winning the war, the U.S.S.R. and Japan had a breakthrough in communications ("Kuril Islands Dispute"). A peace declaration between the two states restored diplomatic ties, and ended the state of war. The Soviet Union offered to return two of the smaller Kuril Islands, Habomai and Shikotan ("Kuril Islands Dispute").

While this declaration was signed and ratified by both parties, Japan later rejected this proposal as, due to a matter of national pride, they did not want to accept that the U.S.S.R. had justifiably taken the Islands as a consequence of losing WWII ("Preface" and "Kuril Islands Dispute"). Additionally, in 1960 the Soviets also recalled this offer of the two Islands as a matter of grave national security (Graf, 20). With the conclusion of the new Japanese-US Security Treaty at the outset of the Cold War, the U.S.S.R. declared that all foreign troops (American troops) must leave Japan before negotiations could resume on returning any of the Islands ("Preface" and Graf, 20).

J: Learn how to make a fair deal! It's not our fault the United States got involved.

In 1956, when Japanese negotiators reached an agreement with their Soviet counterparts to settle the territorial dispute, it was determined that Shikotan and the Habomai Islets would be transferred to Japanese control (Mikovic). In return, Japan would also have to renounce all claims to the much larger islands of Kunashir and Iturup (Pike).

However, even after a joint declaration was established between the two countries, the transfer of territory was halted until a formal peace treaty could be reached ("Kuril Islands, New World Encyclopedia). This is because Japan decided not to accept this deal due to foreign threats. The United States pressured Japan out of this deal, threatening to keep control of Okinawa if Japan accepted this compromise (Gorenburg, 2).

Furthermore, the deal was never equitable to begin with. The two islands that Russia agreed to transfer over to Japan only accounts for 7% of the Kuril Island territory (Gorenburg, 4). The other 93% would remain under Russian control, where most of the economically profitable resources and processes exist.

To this day, Russia has still not honored their commitment to find a compromising solution, as no peace treaty has been reached (Sacko). As the legal successor to the Soviet Union, the Russian Federation is obliged to scrupulously observe all of past obligations, including the unfulfilled compromise on the territorial issue (Mikovic).

R: We are putting in the work to reach an agreement.

In effort to improve overall relations with Japan, the Russian Federation (the successor state to the Soviet Union), has attempted throughout the years to reach a conclusion on this issue. Japan still falsely maintains that it has a historical right to the Kuril Islands, and continues to use outdated treaties from the 19th century as support for this argument. In 2019, however, at a meeting between Japanese Prime Minister Shinzo Abe and Russian President Vladmir Putin, Abe admitted that it is an "unrealistic demand" for Japan to ask for the return of the two largest Islands, Kunashiri and Etorofu (Streltsov, "Why Russia and Japan").

The difficulty that arises for these two states when trying to come to a conclusion, is that this issue is being made about the events that transpired during WWII, not as a general problem of border demarcation. Since Japan continues to define this border issue as a historical one, they have no legitimate claim to the Islands. Because the Soviets integrated the Kuril Islands legally, under the allowance of several international agreements (Yalta Accords, Cairo Declaration, Potsdam Proclamation, and San Francisco Peace Treaty), Japan cannot contest that these lands were illegitimately taken from them (Hara, 45). If, however, Japan and Russia made this a simple issue about border demarcation, not an issue about the conclusion of World War II, they might be able to come to a more mutually desired solution.


Now that you know both sides of the story, who do you think should win this tug-o-war?


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