Rodeo Machine is a track by Japanese DJ and producer HALFBY (Takahiro Takahashi), originally released on his 2005 album GREEN HOURS. The song entered the maimai arcade rhythm game series with the MiLK PLUS update on July 11, 2018, classified under the POPS & ANIME genre. Outside of rhythm games, Rodeo Machine carries a notable web culture history. Its music video, created by the acclaimed design collective groovisions, became a viral fixture on NicoNico Douga, known colloquially as a "video that makes you a little happier" (少し楽しくなる動画). The PV also incorporates HALFBY's track SCREW THE PLAN. The song's partially English lyrics are frequently misheard by Japanese listeners as phrases such as "おまいGONZO！" (Omae GONZO!), "中曽根ティーチャー" (Nakasone Teacher), and "すいませんこれで何聞くの" (Excuse me, what do I listen to with this?). These mishearings spurred real-world offline meetups where fans recreated the PV together, events called "中曽根OFF" (Nakasone Off), which at one point were even organized by NicoNico Douga's own staff. In maimai, this community lore is woven into the game's achievement system, the unlockable titles directly quote the most famous misheard lines. The MASTER chart, designed by はっぴー (Happy), is structurally unusual: it contains zero Hold notes and 215 Slide notes, making it one of the most slide-intensive charts in the DX catalog. The EXPERT chart was designed by サファ太 (Safata). Over successive maimai DX version updates, both the Expert and Master difficulty ratings were revised upward, reflecting the chart's sustained challenge.