For once the YouTube algorithm kicked out a banger.
If you're a Call of Cthulhu tabletop player you're probably aware the game has a huge following in Japan. What I never actually grasped is that Chaosium's creation effectively is tabletop roleplaying there. The Weird Place channel has a great look at some of the cultural quirks that made that happen.
There's a lot to digest here. I was vaguely aware of how important "Record of the Lodoss War" was to popularizing pen and paper RPGs, but never realized CoC campaign recaps were so insanely popular with the Japanese fanbase. More importantly, now I know why a Japanese schoolgirl and her friends pop up whenever I Google "Nyarlathotep".