Ōi is one of Japan’s most accomplished pool players, having recently triumphed at the inaugural 2026 Carabao International Open, securing his second World Nineball Tour ranking title. Building on his impressive career, he previously claimed his first WNT ranking crown at the 2024 Taom Maxrack Nineball Helsinki Open and went on to reach the final of the 2025 European Open, further cementing his status among the world’s elite.