Obviously, the most implausible part of the whole thing is that a TV network would be allowed to essentially hold a guy hostage under false pretenses. There are laws against that, no matter what wacky part of the world you happen to be in. Even Japan.
Uh ... right? JAPAN?
In 1998, Japanese comedian Nasubi was told he was trying out for a potential new reality show for which he would be locked in a room and not let out until he made $10,000 by entering sweepstakes contests via mail (at the time, sweepstakes were kind of a fad in Japan). It was also how he was supposed to feed and clothe himself -- by winning contests for food. Oh yeah, and he was naked at the beginning.
"Rule #1: No fashioning a c**k smock out of that pillow case."
He had been told that there were cameras that would tape his adventure, and then later they might possibly be turned into a show. What they didn't tell him was that, in fact, each week a highlight reel from the live feed aired on national television, and it got almost double the ratings Game Of Thrones gets today. That's 16 million people watching the oblivious and usually nude Nasubi chow down on dog food (the only thing he could win in the beginning), and slowly approaching a mental breakdown from the isolation. Note: Nasubi says he never signed a contract agreeing to this.