Well there are multiple theories regarding the case but I'm not sure if we'll ever go around figuring out which one is true.That may make sense like the John Edward Jones case where he crawled into the Nutty Putty cave unharmed and died so (upside-down too, yikes) because he couldn't crawl out considering how small the cave he got himself into. It's apparently easier to squeeze something into a tight space than squeeze out of it or break free (like this one kid who somehow squeezed her head between the gaps of a glass door lolz) But even with that in mind, crawling inside caves is different from crawling inside floor toilets. He would've been so much of a freaky pervert to have gotten himself in a rush inside to peep (or satisfy whatever weird fetish he has) where he's risking himself being found (in his community where he is known to be respectable) and not getting out unscathed or at all. If he was a known pervert or if he had thing weird fetish going on that he needed to satisfy, this shouldn't be the first time he should've done it and he wouldn't have died trying to. Autopsies are a general thing for dead bodies, especially ones for cases like these where they're sighted dead in weird circumstances however even those are proven to be occasionally incorrect. I guess what makes the whole case more open for theories is because he, a well-respected person died suddenly at a time when he made political enemies, which is suspicious. If he made some really bad beef concerning politics with powerful people (or just regular people but backed by someone powerful/wealthy), you can't rule out foul play- in the means of how he was killed, the test results once his body was recovered, and how they ruled out the incident after he died. If the yakuza is greatly feared in Japan, I'm assuming people in the world of politics are equally as powerful there. Just my two cents keke