On the 20th of July, 2018, a wooden fishing boat washed ashore on a beach in Kanazawa, Ishikawa Prefecture, Japan. Seven dead bodies, thought to be those of North Koreans, were found inside the boat. In this episode, we dig deep and investigate why there has been a spike in the number of these"ghost ships".

From Series 6 of the award-winning series, Undercover Asia.