Jr East Train Simulator Build 11779437 May 2026

If you are a newcomer: Yes, buy the game (the Musashino Line starter pack is recommended), but ensure you apply Build 11779437 immediately. The base game on disc (Version 1.0) is broken compared to this refined state.

| Metric | Build 116700 | Build 11779437 | | :--- | :--- | :--- | | | 58 fps | 87 fps | | 1% Low FPS | 42 fps | 71 fps | | VRAM Usage | 6.2 GB | 5.1 GB | | Load Time (to cab) | 24 seconds | 14 seconds | JR EAST Train Simulator Build 11779437

In this article, we will break down everything you need to know about this specific build—from technical patch notes to performance benchmarks, and why this version number has become a hot topic on rail forums. Before dissecting Build 11779437, it is crucial to understand what this software actually is. Developed in partnership with East Japan Railway Company (JR East), this is not a typical consumer train sim. It utilizes actual commercial driving data (including gradient resistance, ATS/ATC signals, and real-world physics logs) recorded from real revenue services. If you are a newcomer: Yes, buy the