ozma is a blistering instrumental electronic track by TJ.hangneil, an alias of the prolific Japanese composer sasakure.UK, that debuted in maimai でらっくす BUDDiES. The song originated from the WORLD WAR -BATTLE ROYALE IN ALL REGIONS- Be-Music Source (BMS) song contest, where it earned the highest overall rating among all entries under its original BMS credit of "TJ.hangneil vs Jackz." Its BMS genre classification of "irregular" hints at the unconventional, aggressive energy that defines the track: a relentless barrage of rapid-fire synth leads and pounding percussion at a breakneck 220 BPM. The visual accompaniment (movie) was created by _ihcanan. In maimai, ozma was initially available as a limited-time unlock through the TJ.hangneil Area (TJ.hangneilちほー), requiring players to accumulate a cumulative total distance of 30 km during its availability window. The Japanese version ran from December 2023 to March 2024, followed by staggered releases in Asian and Chinese regions. The Expert chart was designed by Jack, the same collaborator credited alongside TJ.hangneil on the original BMS release, while the Master chart was handled by サファ太 (Safata). Beyond maimai, ozma also appears in the PC rhythm game EZ2ON Reboot: R, marking its presence across multiple rhythm game ecosystems.