WThe 2010 Senkaku boat collision incident occurred on the morning of September 7, 2010, when a Chinese trawler, Minjinyu 5179, operating in disputed waters near the Senkaku Islands collided with Japanese Coast Guard's patrol boats. There were several Japanese Coast Guard boats involved, including Yonakuni and Mizuki, which collided with Minjinyu 5179, plus Hateruma and other JCG boats.
WThe East China Sea Air Defense Identification Zone is an Air Defense Identification Zone covering most of the East China Sea where the People's Republic of China announced that it was introducing new air traffic restrictions in November 2013. The area consists of the airspace from about, and including, the Japanese controlled Senkaku Islands north to South Korean-claimed Socotra Rock. About half of the area overlaps with a Japanese ADIZ, while also overlapping to a small extent with the South Korean and Taiwanese ADIZ. When introduced the Chinese initiative drew criticism as the ADIZ overlapped with the ADIZ of other countries, imposed requirements on both civilian and military aircraft regardless of destination, and included contested maritime areas
WThere are disputes between China, Japan, and South Korea over the extent of their respective exclusive economic zones (EEZs) in the East China Sea.
WJapan has the eighth largest exclusive economic zone (EEZ) in the world. The total area of Japan is about 377,975.24 km2. Japan's EEZ area is vast and the territorial waters and EEZ together is about 4.48 million km2.
WThe Kuril Islands dispute, also known in Japan as the Northern Territories dispute, is a disagreement between Japan and Russia and also some individuals of the Ainu people over sovereignty of the four southernmost Kuril Islands. The Kuril Islands is a chain of islands that stretch between the Japanese island of Hokkaido at the southern end and the Russian Kamchatka Peninsula at the northern end. The islands separate the Sea of Okhotsk from the Pacific Ocean. The four disputed islands, like other islands in the Kuril chain that are not in dispute, were annexed by the Soviet Union following the Kuril Islands landing operation at the end of World War II. The disputed islands are under Russian administration as the South Kuril District of the Sakhalin Oblast. They are claimed by Japan, which refers to them as its Northern Territories or Southern Chishima, and considers them part of the Nemuro Subprefecture of Hokkaido Prefecture.
WThe Liancourt Rocks are a group of small islets in the Sea of Japan. While South Korea controls the islets, its sovereignty over them is contested by Japan.
WThe Liancourt Rocks dispute is a territorial dispute between South Korea and Japan. Both countries claim sovereignty over the Liancourt Rocks, a group of small islets in the Sea of Japan which are referred to as "Dokdo" in Korean and "Takeshima" (竹島) in Japanese. North Korea also claims sovereignty of the islands.
WThe Senkaku Islands are a group of uninhabited islands in the East China Sea. They are located east of mainland China, northeast of Taiwan, west of Okinawa Island, and north of the southwestern end of the Ryukyu Islands. They are known in mainland China as the Diaoyu Islands or Diaoyu Dao and its affiliated islands, in Taiwan as the Tiaoyutai Islands / Diaoyutai Islands, and in the Western World are sometimes impartially referred to by the historical name Pinnacle Islands. In Okinawan they are called yukunkubajima. In Yaeyama dialect, they are called iigunkubajima.
WThe Senkaku Islands dispute, or Diaoyu Islands dispute, concerns a territorial dispute over a group of uninhabited islands known as the Senkaku Islands in Japan, the Diaoyu Islands in the People's Republic of China (PRC), and Tiaoyutai Islands in the Republic of China. Aside from a 1945 to 1972 period of administration by the United States as part of the Ryukyu Islands, the archipelago has been controlled by Japan since 1895. According to Lee Seokwoo, the People's Republic of China (PRC) started taking up the question of sovereignty over the islands in the latter half of 1970 when evidence relating to the existence of oil reserves surfaced. Taiwan also claims the islands. The territory is close to key shipping lanes and rich fishing grounds, and there may be oil reserves in the area.
WThe Shandong Problem was a dispute over Article 156 of the Treaty of Versailles in 1919, which dealt with the concession of the Shandong Peninsula. It was resolved in China's favor in 1922.
WThe Syngman Rhee Line refers to a marine boundary line established by South Korean President Syngman Rhee in his "Peace Line" declaration of January 18, 1952, establishing a wide area of maritime sovereignty, beyond internationally accepted territorial waters, around the entire Korean Peninsula. This included placing the Liancourt Rocks (Dokdo/Takeshima) in South Korean territory.