- Commercialization of a 6-car train led by KURO 381-141, which started operating in JNR color from March 2022, as a special project product.
- Accurately reproduces the renewed appearance (removal of side sabots, embedded side emergency exit, LED side display, car number plate) and JNR mark added from March 2023.
- SAHA 381-231 reproduces the exterior with more ventilators lined up at the end of the roof vehicle near Okayama than other vehicles, and the window arrangement with small windows of the former smoking room.
- A dummy coupler is used at the front of the lead car. The intermediate connection part uses a body mount close coupler without hooks.
- Head/tail light, nickname display lighting
- Adoption of a slotless motor realizes even smoother and quieter running performance
- Equipped with KATO's unique body pendulum mechanism that reproduces the inward tilt of the body when passing through curves, just like the actual vehicle.
- The nickname display uses a convertible train mark. Contains two types: "Yakumo (wide)" and "Yakumo (narrow)"
- Accessories…Destination display sticker, train mark driver
- DCC friendly
- Compatible with interior lighting kit Kato 11-211 (11-212) and Kato 11-213