BANGKOK, THAILAND - Thailand's Supreme Court has ruled that TV superhero Ultraman is not Thai, rejecting a complaint by a local businessman who claimed he helped invent the iconic Japanese character, an official said Wednesday.

The ruling ended a 10-year legal battle by Sompote Saengduenchai, who had claimed he co-invented the Ultraman character and was entitled to a portion of the huge profits generated by the series and its licensed products outside of Japan.

The judges found Sompote did not contribute any creativity to the Ultraman character when it was first created more than four decades ago, the official said.

First aired in 1966 in Japan, the Ultraman series and its spinoffs have an enormous following across Asia, where the show is a rite of passage for many young children. Clad in a red and silver skin-tight suit, and with opaque insect-like eyes set in a silver full-face helmet, the 40-metre (130-foot) tall Ultraman hails from the M-78 nebula, and uses his spacium beam weapon and martial arts skills to help humans battle evil aliens.