Masaki Ukyō (右京　雅生, Ukyō Masaki) is a Japanese video game designer and programmer at R.U.N (Release Universe Network) and a former Fill-in-Cafe and Treasure game designer. He joined Treasure from April 1993 to April 2004. He established the company R.U.N with former Fill-in-Cafe employee Masatoshi Imaizumi.

This biography of a living person needs additional citations for verification. (January 2017)

Director

• Guardian Heroes
• Silhouette Mirage

Game designer

• Code of Princess
• Bangai-O Spirits
• Mad Stalker: Full Metal Force (with Masatoshi Imaizumi)

Programmer

• Advance Guardian Heroes
• Mad Stalker: Full Metal Force (with Masatoshi Imaizumi)
• Phantom Breaker (with Masatoshi Imaizumi)
• Rakugaki Showtime
• Silhouette Mirage
• Silpheed: The Lost Planet
• Sin & Punishment: Star Successor
• Tiny Toon Adventures: Defenders of the Universe (Cancelled)
• Yū Yū Hakusho Makyō Tōitsusen

Graphic designer

• Mad Stalker: Full Metal Force (with Masatoshi Imaizumi)

Localization

• Silhouette Mirage

• Masaki Ukyo at MobyGames