1. Executive Summary This report analyzes the ecosystem of Naruto-themed mobile games distributed in Java Archive (JAR) format, specifically optimized for screen resolutions of 128x160 pixels . This specification was a standard for entry-level and mid-range mobile phones (e.g., Nokia Series 40, Sony Ericsson K/S series) during the feature phone era (approx. 2004–2011). The subject represents a niche retro-gaming category focused on portability, hardware limitations, and IP-driven mobile content. 2. Technical Specifications | Parameter | Specification | |-----------|----------------| | File Format | .jar (Java ME – Micro Edition) | | Resolution | 128 x 160 pixels (portrait mode) | | Color Depth | 65k to 262k colors (device-dependent) | | Heap Memory | 512 KB – 2 MB (typical limit) | | Input Method | Numeric keypad (2,4,5,6,8 often for movement; 5 for action) | | Audio | MIDI (polyphonic), occasional limited PCM |