Go Shijima (詩島 剛, Shijima Gō) is a freelance photographer and Kiriko Shijima's younger brother who transforms into Kamen Rider Mach (仮面ライダーマッハ, Kamen Raidā Mahha). Go Shijima was born in 1996 and the younger brother of Kiriko Shijima. Both siblings were raised by their mother, Sumiko Shijima, and did not know who their father was. Unaware to him, his father had done something bad to his wife, and leaving his family in a tragic life. After their mother passed away, Kiriko is the only family membe