http://www.obsnews.co.kr/news/articleView.html?idxno=1251506

Busan Mayor candidate from Democratic Party: 

While I was the vice mayor of the administration, I reviewed the feasibility and economic feasibility of the Korea-Japan Submarine Tunnel with related experts. As a result, it was concluded that there was no validity, so I didn't even make a presentation, and I closed it.....

Busan can be the terminal station of Eurasia, centered on the North-South railway... If you suddenly go to the Hanil Submarine Tunnel, all the established systems can be shaken.

http://www.gukjenews.com/news/articleView.html?idxno=2161749 ;