Ryoga Ishio is a Japanese defender born in Osaka on 18 May 2000. He came through Cerezo Osaka's youth setup and played for Cerezo Osaka U-23 before moving to Zweigen Kanazawa in 2019. He later played for Tokushima Vortis and joined Ehime FC from the 2025 season. Ishio has built his senior career in Japanese league football as a defender with experience across J2 and related competitions.