Hiro is a Japanese engine formerly known as the Master of the Railway.
- 2013 (updated face, curved edges, and longer magnet guards)
- 2018 (printed details on exposed wood, single bogie, printing on front bufferbeam, no headlamp, flat rectangular tender)
- 2019 (printed details on painted wood)
- Lost and Found Hiro
- Patchwork Hiro
- Early Engineers Hiro
- Metallic Hiro
- Battery-Operated Hiro
- Milk Covered Hiro from Hiro's Sticky Spill
- 2009 Hiro's tender uses the same basis as Sam and Hank's tenders.
- Hiro's Character Card does not show his tender.
- The 2018 Hiro shares the same body with Gordon.