Digital copies are used for emulation (via PCSX2) or playing on hardware with an ODE (Optical Drive Emulator) like MechaPawn or FreeMcBoot.
You can find the Captain Tsubasa ISO on specialty archives like DLPSGame , which hosts various PS2 Classics. Installation for Emulation: Download the NTSC-J ISO file. Open your PS2 emulator (e.g., PCSX2 ). Download Captain Tsubasa (J) [SLPS 25691] PS2
Since the game is in Japanese, these resources can help you navigate the menus and master the mechanics: Digital copies are used for emulation (via PCSX2)