[1] Ōta was born in Haboro, Hokkaidō Prefecture, Japan on 10 November 1951.
In 1981, he won the Best Work Award at the 1st Poetry and Fairy Tale Illustration Contest sponsored by Sanrio.
[1] In 1992, Ōta held his first series of exhibitions at department stores in every major city in Japan.
Ōta established his home page in 2000 for the 20th anniversary of his professional debut.
Sources:[2] Ōta was featured as the cover artist on several issues of Moe, a monthly art and illustration magazine published in Japan by Hakusensha since 1984.