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The neighboring countries of North Korea are South Korea, China, Russia, Japan, and Mongolia.
Japan fought against China and Korea.
China and North Korea have poorer economy compare to South Korea and Japan.
Japan is by China, the coasts of North Korea and South Korea and next to the sea of 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.
The four countries closest to Japan are China, Russia, North Korea, and South Korea.
The Neighbors Of Japan Are RUSSIA AND CHINA
Japan, China, South Korea, North Korea, Vietnam, Laos.
Diffusion from Korea and China
It was okay based on what was happening in both China & Korea.
It was separated by the Sea of Japan.