Takuya Yamashiro is the protagonist of the Japanese television series 'Supaidāman', which aired in 1978. He is a young motocross racer who acquires spider-like abilities after an alien spaceship crash-lands on Earth. The spaceship's pilot, Garia, injects him with a mysterious liquid called the 'Spider Extract', granting him superhuman strength, agility, and the ability to cling to surfaces. Takuya uses these powers to fight the evil Iron Cross Army as Spider-Man, equipped with a special bracelet that shoots webbing and controls his giant robot, Leopardon. His role is pivotal in defending Earth from extraterrestrial threats.