Koji Inada is a Japanese manga artist. He graduated from Tokyo Metropolitan College of Aeronautical Engineering. He is associated with Weekly Shōnen Jump. Dragon Quest: The Adventure of Dai, which he created with writer Riku Sanjo, is one of the best-selling manga in history with over 47 million copies sold. The two also created Beet the Vandel Buster, which has 4 million copies in print. Inada had been ill since September 2006, which led to the hiatus of Beet the Vandel Buster at volume 12.