This Z Shorty starter set includes a three-car model of the 923 Series Doctor Yellow, T4 formation, together with the components required to run it: one powered chassis, two trailer chassis, a train controller and a track layout. The included RC-004 train controller is finished in yellow, an exclusive colour for this set. The layout can be expanded with additional track and scenery, sold separately.

About the Z SHORTY series
Z Shorty is an ultra-compact rolling stock range in Z scale, developed by Rokuhan to run on very tight radii and minimalist layouts.
Set contents
- 1 × Z Shorty 923 Series Doctor Yellow T4 model train, consisting of 3 cars.
- 1 × Shinkansen-type powered chassis.
- 2 × Shinkansen-type trailer chassis.
- 2 × 110 mm straight track sections.
- 8 × R45 45° curved track sections.
- 1 × Z Shorty RC-004 train controller in a set-exclusive yellow finish.
- 1 × Z Shorty rerailer.
- 1 × decal sheet.
- 1 × instruction manual.
The Doctor Yellow is an inspection train used on the Tokaido and Sanyo Shinkansen lines. It checks track condition, overhead catenary equipment and signalling circuits while travelling at high speed. Operated by JR Central, formation T4 was retired after its final inspection run in January 2025.