In Japan, there is an anime called Love Live! It's about schoolgirl idols. It's more than just popular. Way more.
As Twitter user S1Amk shows, a Sega arcade in Osaka Prefecture set up a special area where Love Live! fans can prostrate themselves (bow completely down in what's called "dogeza" or 土下座 in Japanese) before the characters and make offerings.
Keep in mind, with a lot of this fandom, the worshipping element is tongue-in-cheek. This is a fun way for fans to show how hardcore they are. And Love Live! fans can certainly be hardcore. (It's also a clever way for Sega to promote its Love Live! collaborations.)
On Twitter, some noted that this was also a way for the arcade employees to get free snacks and cakes. Hey, somebody has to eat those offerings!