Taiki Amagasa is a midfielder from Gunma Prefecture. He played youth football with Maebashi FC and Aomori Yamada High School before attending Kansai University. Thespakusatsu Gunma gave him his first professional platform in 2020, and he became a regular there over several J2 League seasons. After a 2025 move to Oita Trinita, Amagasa joined JEF United Chiba in January 2026, bringing J2 experience and a central midfield profile to the squad.