Given the question: Information:  - Japan ("Nippon" or "Nihon" ; formally "" or "Nihon-koku", means "State of Japan") is a sovereign island nation in Eastern Asia. Located in the Pacific Ocean, It is lying off the eastern coast of the Asia Mainland (east of China, Korea, Russia) and stretching from the Sea of Okhotsk in the north to the East China Sea and near Taiwan in the southwest.   - History. Kagoshima Prefecture corresponds to the ancient Japanese provinces sumi and Satsuma, including the northern part of the Ryukyu Islands ("Satsunan"). This region played a key role in the Meiji Restoration (Saigo Takamori), and the city of Kagoshima was an important naval base during Japan's 20th century wars and the home of admiral Tg Heihachir. More recent incidents are the sinking of a North Korean spy ship (100 ton class) in 2001 by the Coast Guard, which was later salvaged and exhibited in Tokyo, and the abduction of an office clerk from a Kagoshima beach in 1978 by agents from the same country. This became known only recently under the Koizumi administration.  - Takarajima (  ) , literally `` treasure island '' , is one of the Tokara Islands , belonging to Kagoshima Prefecture . The island , 7.14 km² in area , has a population of 116 persons . The island can only be reached by boat as it has no airport ; there is regular ferry service to the city of Kagoshima on the mainland of Kyushu . Travel time is about 13 hours . The islanders are dependent mainly on fishing and seasonal tourism .  - The is an archipelago in the Nansei Islands, and are part of the Satsunan Islands, which is in turn part of the Ryukyu Archipelago. The chain consists of twelve small islands located between Yakushima and Amami-Oshima. The islands have a total area of . Administratively, the whole group belongs to Toshima Village, Kagoshima Prefecture, Japan. Only seven of the islands are permanently inhabited. The islands, especially Takarajima, are home to the Tokara Pony.  - In the 8th century Taih Code reforms, Dazaifu was established as a special administrative term for the region.  - The was an administrative reorganization enacted in 703 in Japan, at the end of the Asuka period. It was historically one of the . It was compiled at the direction of Prince Osakabe, Fujiwara no Fuhito and Awata no Mahito. The work was begun at the request of Emperor Monmu and, like many other developments in the country at the time, it was largely an adaptation of the governmental system of China's Tang dynasty.    After reading the paragraphs above, choose the best answer for the entity that related to 'takarajima' with the relationship of 'located on terrain feature'.  Choices: - airport  - asia  - beach  - china  - coast  - east china sea  - russia  - sea of okhotsk
The answer is:
east china sea