Search for the "Onechanbara Special HD Texture Pack" on dedicated emulation forums. These are usually .paki or loose texture files that you place in the xenia/content/ folder.

Once you have the normal .rar or .7z file, extract it. You should see a single .iso file. Use a tool like 7-Zip to check the integrity.

Avoid torrent sites with pop-up ads. Instead, check the Internet Archive (archive.org) using the term "Onechanbara Special (Japan)." Look for uploads from verified users with high ratings.

The demand for a shows that players want to experience this lost title in the best way possible—not through a blurry, low-FPS original, but through enhanced emulation.