In Japan, charumera is the name for the small horn and tune used by travelling ramen sellers to let neighbourhoods know noodles were on sale. Over time the sound became a familiar cultural cue, appearing in anime, films and travel videos whenever a ramen stall or late-night street scene is shown. Online creators now reuse the short jingle as instant shorthand for Japan, comfort food and nostalgia, which is why a clip lasting only a few seconds still reads clearly even without any picture of a vendor.