Takaomi Kaji is a high school student and skilled shamisen player hailing from Osaka. He leads the Osaka shamisen competition team "Billiken-san." His playing style demonstrates steady technique and flawlessly synchronized performances. Kaji attracts notice both for his physical presence and his musical talent. He naturally speaks in a distinctive Kansai dialect. Within the competitive shamisen circuit, Kaji stands as a rival to the protagonist, Setsu Sawamura. He participates in regional team competitions, showcasing his leadership of the Osaka group.