In PPSSPP, go to Settings > Tools > Developer Tools and check the box for "Replace textures" . Gameplay Features & Differences

Locate a community-verified texture pack (often hosted on sites like GitHub or community forums).

For years, English-speaking fans relied on memory or community menu translations to navigate the game. Today, community-driven allow players to enjoy the game with translated menus and UI elements. Understanding the English Patch

Open your PPSSPP folder and navigate to memstick -> PSP -> TEXTURES .

Because cutscenes are full-motion videos (FMVs) rather than real-time rendered textures, they often remain in Japanese. Additionally, in-game dialogue subtitles may still appear in Japanese in many available versions. How to Install the Translation (PPSSPP)

Create a folder named after the game's ID (typically ULJM05505 for Tenchu San Portable).

Mastering Stealth: The Tenchu San Portable PSP English Patch Guide