- Name: Keiichi Ueno (上野圭市)
- Twitter: https://twitter.com/Keiichi__Ueno
One of beatmania IIDX's first commission artists, Keiichi Ueno is best known in beatmania IIDX for his pop and drum'n'bass songs. Since pop'n music 16 PARTY♪, he's also composed songs for the pop'n music series as well. Outside of BEMANI he has composed/arranged various anime songs, the most notable being Change the World, the first opening theme to the animated adaption of InuYasha.
- ANAL SPYDER (member of, with 松井寛)
- Baby Weapon
- DJ SUWAMI
- DJ Swan / DJ SWAN / D.J.SWAN (member of, with 小宮利明)
- Honey P
- Risky Men (member of, with Miracle-K)
- SILVER FOX PRODUCTIONS (arrangement)
- Due to copyright issues with JASRAC, none of Keiichi Ueno's beatmania IIDX songs have yet to appear in beatmania IIDX INFINITAS.