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Naruto Ultimate Ninja 5 was developed by CyberConnect2 and published by Bandai Namco Games. Downloading a commercial PS2 game as an ISO—even a "highly compressed" one—without owning the original disc is generally considered piracy and violates copyright laws in most countries. Additionally, many websites offering "free highly compressed ISOs" are often unsafe, bundling malware, adware, or misleading links.

I understand you're looking for information about Naruto Ultimate Ninja 5 for the PS2, specifically a highly compressed ISO file that is free to download. However, I need to pause and provide an important clarification before proceeding.