They claim the pollution of japan didnt effect korea...we ask you how far away is japan to mkorea by straight line of sea coast to sea coast here is your answer......
Japan–Korea Undersea Tunnel

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From Wikipedia, the free encyclopedia
Japan–Korea Undersea Tunnel
The proposed routes for the Japan–Korea undersea tunnel.
Japanese name
Kanji 日韓トンネル
Transcriptions

Korean name
Hangul 한일 해저 터널
Hanja 韓日 海底 터널
Transcriptions



The Japan–Korea Undersea Tunnel, also known as the Korea–Japan Undersea Tunnel, is a proposed tunnel project to connect Japan with South Korea via an undersea tunnel crossing the Korea Strait that would use the strait islands of Iki and Tsushima, a straight-line distance of approximately 128 kilometers (80 mi) at its shortest.[