Uehara had been suffering from liver cancer. A private funeral was held with his relatives and his eldest son Keitaro leading the ceremony.
Uehara was the head writer of the first five series of Super Sentai- localized in the west as Power Rangers. His work on other tokusatsu shows (live-action fantasy shows with a large focus on special effects, usually based around superheroes or monsters) includes Ultraman, the Metal Hero series, and Toei’s Spider-Man series. He was also a writer for anime including UFO Robo Grendizer, Getter Robo, and Captain Harlock.