Shinobi is SEGA's long-running ninja action series, launched in arcades in 1987, and its Mission Clear jingle was composed by Yasuhiro Kawakami. The short fanfare played at the end of every stage, drilling itself into a generation of arcade players. It resurfaced online as emulators, retro compilations and speedrunning culture revived classic arcade soundtracks, and streamers adopted it as a tongue-in-cheek victory sting. It endures because four seconds is all it takes to say you won, with unmistakable retro flavor.