located_in_the_administrative_territorial_entity japan national route 290
The Sea ___MASK91___ Japan ( see below for other names ) is a marginal sea between the Japanese archipelago , Sakhalin , and the Asian mainland . The Japanese archipelago separates the sea from the ___MASK21___ . It is bordered by Japan , North Korea , Russia and South Korea . Like the Mediterranean Sea , it has almost no tides due to its nearly complete enclosure from the ___MASK21___ . This isolation also reflects in the fauna species and in the water salinity , which is lower than in the ocean . The sea has no large islands , bays or capes . Its water balance is mostly determined by the inflow and outflow through the straits connecting it to the neighboring seas and ___MASK21___ . Few rivers discharge into the sea and their total contribution to the water exchange is within 1 %. History . Until after the Meiji Restoration , the area that is now ___MASK5___ was divided into Echigo Province ( on the mainland ) and Sado Province . During the Sengoku period , the Nagao clan , who were at times vassals to the Uesugi , ruled a fief in the western part of modern Niigata from Kasugayama Castle . The most notable member of the Nagao clan was Nagao Kagetora , later and better known as Uesugi Kenshin . He unified the leaders of Echigo Province and became its sole ruler . By taking the surname Uesugi , he also became the head of the Uesugi clan and effectively brought their realm under his control . Korea is a historical state in ___MASK81___ Asia , since 1945 divided into two distinct sovereign states : ___MASK52___ ( officially the " Democratic People ' s Republic ___MASK91___ Korea ") and ___MASK80___ ( officially the " Republic ___MASK91___ Korea "). Located on the Korean Peninsula , Korea is bordered by ___MASK94___ to the northwest and Russia to the northeast . It is separated from Japan to the east by the Korea Strait and the ___MASK81___ Sea . History . Until the Meiji Restoration , the area ___MASK91___ Fukushima prefecture was part ___MASK91___ what was known as Mutsu Province . ___MASK90___ ( from the  Rus '), also officially known as the Russian Federation , is a country in Eurasia . At , ___MASK90___ is the largest country in the world by surface area , covering more than one - eighth ___MASK91___ the Earth ' s inhabited land area , and the ninth most populous , with over 140 million people at the end ___MASK91___ March 2016 . The European western part ___MASK91___ the country is much more populated and urbanised than the eastern , about 77 % ___MASK91___ the population live in European ___MASK90___ . ___MASK90___ ' s capital Moscow is one ___MASK91___ the largest cities in the world , other major urban centers include Saint Petersburg , Novosibirsk , Yekaterinburg , Nizhny Novgorod and ___MASK12___ . Asia is ___MASK48___ ' s largest and most populous continent , located primarily in the eastern and ___MASK34___ hemispheres and sharing the continental landmass of Eurasia with the continent of Europe . Asia covers an area of , about 30 % of ___MASK48___ ' s total land area and 8 . 7 % of the ___MASK48___ ' s total surface area . The continent , which has long been home to the majority of the human population , was the site of many of the first civilizations . Asia is notable for not only its overall large size and population , but also dense and large settlements as well as vast barely populated regions within the continent of 4 . 4 billion people . Geography . Uonuma is located in an inland region ___MASK91___ south - central ___MASK5___ , bordered by Fukushima Prefecture to the area and Gunma Prefecture to the south . Parts ___MASK91___ the city are within the borders ___MASK91___ Oze National Park or the Echigo Sanzan - Tadami Quasi - National Park History . The aboriginal people once inhabited the area now known as ___MASK100___ . ___MASK100___ and ___MASK53___ were known as Dewa Province until the Meiji Restoration . National Route 290 is a national highway ___MASK91___ Japan connecting Murakami , Niigata and Uonuma , Niigata in Japan , with a total length ___MASK91___ 165 . 5 km ( 102 . 84 mi ) . ___MASK51___ , officially the Republic ___MASK91___ ___MASK94___ ( ROC ), is a state in East Asia . Neighbors include ___MASK94___ ( officially the People ' s Republic ___MASK91___ ___MASK94___ , abbreviated as PRC ) to the west , Japan to the northeast , and the Philippines to the south . ___MASK51___ is the most populous state that is not a member ___MASK91___ the United Nations , and the one with the largest economy . Geography . ___MASK42___ is located on the Sea ___MASK91___ Japan coast ___MASK91___ far ___MASK34___ ___MASK5___ , bordered by Yamagata Prefecture to the north and east . , is an area consisting ___MASK91___ open Greenland in Fukushima , Tochigi , Gunma and Niigata Prefectures in Japan . The park is 372 km² in area and is the 29th national park in Japan . The Sea ___MASK91___ Okhotsk is a marginal sea ___MASK91___ the western ___MASK21___ , lying between the Kamchatka Peninsula on the east , the Kuril Islands on the southeast , the island ___MASK91___ Hokkaido to the south , the island ___MASK91___ Sakhalin along the west , and a long stretch ___MASK91___ eastern Siberian coast ( the Shantar Sea ) along the west and north . The northeast corner is the Shelikhov Gulf . The sea is named after Okhotsk , the first Russian settlement in the Far East . The ___MASK21___ is the largest of the Earth ' s oceanic divisions . It extends from the Arctic Ocean in the north to the Southern Ocean ( or , depending on definition , to Antarctica ) in the south and is bounded by Asia and Australia in the west and the Americas in the east . ___MASK94___ , officially the People ' s Republic of ___MASK94___ ( PRC ), is a unitary sovereign state in East Asia . With a population of over 1 . 381 billion , it is the world ' s most populous country . The state is governed by the Communist Party of ___MASK94___ , and its capital is Beijing . It exercises jurisdiction over 22 provinces , five autonomous regions , four direct - controlled municipalities ( Beijing , Tianjin , Shanghai , and Chongqing ), and two mostly self - governing special administrative regions ( Hong Kong and Macau ), and claims sovereignty over Taiwan . The country ' s major urban areas include Shanghai , Guangzhou , Beijing , Chongqing , Shenzhen , Tianjin and Hong Kong . ___MASK94___ is a great power and a major regional power within Asia , and has been characterized as a potential superpower . ___MASK35___ (" Nippon " or " Nihon " ; formally "" or " Nihon - koku ", means " State ___MASK91___ ___MASK35___ ") is a sovereign island nation in Eastern Asia . Located in the ___MASK21___ , It is lying off the eastern coast ___MASK91___ the Asia Mainland ( east ___MASK91___ ___MASK94___ , Korea , Russia ) and stretching from the Sea ___MASK91___ Okhotsk in the north to the East ___MASK94___ Sea and near Taiwan in the southwest . History . ___MASK35___ was without horses until around the fifth century CE . The ancient province ___MASK91___ Gunma was a ___MASK56___ ___MASK91___ the horsebreeding and trading activities for the newly immigrated continental peoples . The arrival ___MASK91___ horses and the remains ___MASK91___ horse - tackle coincides with the arrival ___MASK91___ a large migration from the mainland . From this point forward , the horse became a vital part ___MASK91___ Japanese military maneuvers , quickly displacing the older Yayoi tradition ___MASK91___ fighting on foot .