Why hunt for a Japanese ISO when PES 6 is easy to find? Because the Japan Exclusive version contains content that Konami locked away.
What is the difference between PES 2007 (PS2) and PES 6? : r/WEPES world soccer winning eleven 10 japan rom iso exclusive
The Western version had a generic "World Tour" mode. The Japanese ISO exclusive has a dedicated Nippon Challenge . You take the Japanese National Team (circa 2006) through a grueling set of historical matches. You must beat specific opponents using real-world historical conditions (e.g., come back from 2-0 down vs. Australia, or hold off Brazil for 45 minutes). Completing it unlocks legendary Japanese players like Hidetoshi Nakata and Shunsuke Nakamura at their peak. Why hunt for a Japanese ISO when PES 6 is easy to find
