Mamoru Izawa is a Japanese footballer known for his technical skills, tactical intelligence, and versatility as a midfielder. He consistently wears the #8 jersey for Japanese national youth teams. His football journey started at Shutetsu Elementary School, where he formed the "Shutetsu Trio" with Teppei Kisugi and Hajime Taki, relying on coordinated one-two passing and defensive coordination. Transferring to Nankatsu, he played for their elementary, middle, and high school teams, becoming a regular midfielder and secondary playmaker behind Tsubasa Ozora, noted for their effective understanding. During elementary prefectural qualifiers, he served as temporary captain for Nankatsu SC when Genzo Wakabayashi was injured. Izawa's playing style emphasizes aerial dominance, technical dribbling, and precise passing. He specializes in headers, frequently winning aerial duels and scoring with techniques like the "5-meter Diving Header," first used against Furano Middle School from a Tsubasa pass. Additional skills include heel passes, swift interceptions, and accurate ground shots, though these often lacked power against top goalkeepers like Ken Wakashimazu. Despite his midfield role, he demonstrated solid tackling and positioning, enabling him to fill defensive gaps. Representing Japan's "Golden Generation," he typically served as a substitute or utility player across U-15, U-19, U-22, and U-23 levels. His flexibility proved valuable in critical matches, like replacing the injured Jito as a defender in a U-22 friendly against Denmark, allowing Japan to adjust its defense mid-game. He saw increased playing time during Asian qualifiers for the AFC Youth Cup and World Youth tournaments when key players were unavailable. In high school, he remained a core part of Nankatsu’s midfield, contributing assists, defensive support, and coordinated attacks with the Shutetsu Trio, helping Nankatsu reach three consecutive national finals. Professionally, he joined Yokohama F. Marinos. He continued representing Japan in Olympic squads during the "Golden-23" and "Rising Sun" arcs, participating in qualifiers and tournaments as a reliable, multi-functional player. Physically, Izawa stands 178 cm tall as an adult, with a slender build and moderately long hair, growing from 155 cm in elementary school to 177–178 cm in high school and beyond. He shares positional similarities and some physical traits with Hikaru Matsuyama, as both alternated between midfield and defense. In some regional adaptations, the character is known as "Paul Diamond."