Matazō Kamiya is a central figure in the anime Xpress Train, known as the God of Groping and a master of the fictional discipline Chikan-do: The Way of the Groper. His background is that of an older, highly experienced individual who has taken nearly five hundred apprentices in his particular art, suggesting a long and dedicated career focused on this practice. His personality is marked by a calm, almost philosophical demeanor regarding his skills; he does not appear to act out of malice but rather treats his actions as a refined craft. His primary motivation is to pass on his knowledge and maintain the legacy of his techniques, as demonstrated when he accepts the protagonist as his five-hundredth apprentice after being confronted. In the story, Matazō serves as the catalyst for the protagonist Kazuo Sugimoto’s transformation. Initially the true culprit behind the false accusation against Kazuo, Matazō becomes Kazuo’s mentor after their confrontation, guiding him into a new worldview and skillset. His key relationship is with Kazuo, moving from antagonist to teacher. His development is static; he remains the authoritative master throughout, showing no significant personal change. His notable abilities are his unparalleled skill in non-consensual touching on crowded trains, which he has honed to an art form, allowing him to evade detection and instruct others in the same methods. He is portrayed as a figure of confidence and expertise within his niche, commanding respect from his apprentices.