>>280859656
Google Lens didn't help much for these signs, though I do see that the bags in the back are labeled "polishing powder". Also, cute ghost logo.

>>280859650
Yeah, I half wonder if that scarab line is a mistranslation or something or Rumiko maybe felt like tacking on some more trivia. I thought maybe a scarab would show up later, but uh, nope. Maybe it is referencing the Egyptian myth with scarabs?