He graduated from Tokyo Metropolitan College of Aeronautical Engineering.
His drawing style is very similar to that of Toriyama Akira on Dragon Quest - Dai no Daibouken, because it is based on the game series Dragon Quest, which Toriyama was the character designer since 1986.
He is associated with Shueisha.
He used to be an assistant under Usune Masatoshi, Katsura Masakazu & Kuroiwa Yoshihiro.
USUTA Kyousuke & ARUGA Teruto once worked as his assistants.

Much to his, and his fans dismay, Inada was ill from September 2006, which led to the hiatus of Bouken Ou Beet at volume 12, but he recovered in 2018 and resumed work on the series.

Not to be confused with other INADA Kouji (稲田晃司).