This last time this was attempted, in the Sea of Japan, there was a horrendous gun battle between the two sides. Just several years ago.
The Japanese Self Defense forces eventually sank the ship.
It was raised from the bottom of the ocean (the DPRK denied it even had such a ship there and sunk), and all the espionage materials were taken out of it and put in display in Tokyo--along with the hull of the ship, for thousands of Japanese to see. It was more popular than Tokyo Disneyland for a few weeks.
Folks, get ready for fireworks.
If your dad or grandad or uncle can't stand the 'japs', because of the "Big One", they better get used to being comrades in arms with Japan and perhaps even suffering casulties together.
Love it ... fits very nicely with SK turning NK's infiltration tunnels into tourist attractions. The make a point of showing which direction the tool-marks in the rock point, to prove that the NK's dug the tunnels.