 He is voiced by Kenjirō Tsuda in Japanese media Erik Davies in English media, and portrayed by Hirofumi Araki in The Prince of Tennis live-action film.Inui's data tennis allows him to predict the probability of a shot taking place although other factors can disrupt the probability.Though he relies on data, he still trains excessively to keep up with his teammates, taking on a training load 2.25x more than Kaidoh's, which is already 3x ahead of the rest of the team.