The only country that borders South Korea is North Korea. South Korea is also very close to Japan and China over the water.
. China . Taiwan . North and South Korea . Russia Refrences: http://en.citizendium.org/wiki/Japan
Japan has no bordering countries since it is made of islands. The five closest countries to Japan are (in order) Russia, South Korea, North Korea, China, and Taiwan. North and South Korea, Russia and China.
North Korea
The four countries closest to Japan are China, Russia, North Korea, and South Korea.
North Korea invaded South Korea.
japans nearest neighbours are china, Korea and russia japans nearest neighbours are china, Korea and russia
The second country closest to Japan is South Korea, located across the Korea Strait, a 200 km wide channel. The closest country is Russia, located about 10 kilometers between Soisho-to island and Hokkaido.
The Island of Kyushu
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Japan is an archipelago consisting of four major islands on the Eastern edge of Asia. Its closest neighboring country is Russia.
The neighboring countries of North Korea are South Korea, China, Russia, Japan, and Mongolia.
Seoul is a city completely bounded by the country of South Korea. (It is not like Nicosia, Cyprus, which is actually on the border with the Turkish Republic of North Cyprus.) South Korea only has a land border with North Korea, but this is an impassible border.