Shita e mairimasu is a standard polite announcement heard in elevators across Japan, meaning the car will go down. The phrase uses humble keigo speech common in public announcements. Clips of Japanese elevator voices became popular with viewers fascinated by everyday life in Japan, and short recordings spread through meme soundboards and video edits. Creators like it because it is instantly recognizable to Japan fans, very short, and dryly formal, turning any downward move into a deadpan joke without needing translation.