I'm interested if they actually dug into deeply. It aired as a segment of a bigger show, and all the other segments were obviously exaggerated or outright fake, but people take the Nasubi one at face value. There was a longer youtube video on it, but it got copyright claimed recently. I think they found out that it wasn't a 24 hour livestream like most people say, but short segments at specific times, and it was also obviously prerecorded.
Want some rye? 'Course ya do!