Only in Japan. Gautaman feels like a close sibling to Hentai Kamen, the underwear-wearing superhero who fights crime with his almost-bare body. You'll find the same kind of absurdities in Gautaman, the biggest difference being that this series throws some random religious elements in the mix.
A devout Christian girl is approached by Buddha, who reveals to her that she is chosen to become Gautaman, a savior who draws her divine powers from a sumo belt. She accepts her mission, but she isn't quite ready for the costume she is supposed to wear, which clashes with her religious upbringing.
Gautaman is utterly daft and nonsensical, but that's exactly what makes this so much fun. The animation is pretty basic and the plot is negligible, but who cares. The bad guys are hilarious, the comedy is bonkers and pacing fast. I didn't expect a lot from this one, but this was a more than pleasant diversion.