- The new 273 series "Yakumo" and the 381 series "Yuttari Yakumo" that replaced it are produced in their later years' specifications.
- In addition to the gray bogies seen in the later years, only Kuro 381-139 has a distinctive appearance with all gray underfloor equipment.
- The side sign holders have been removed, emergency exits have been embedded on the sides, LED side displays have been used, and the plated car number has been reproduced.
- The passenger door H-rubber of Kuro 381-139 is black, and the edging of the passenger door window of car 7 (Kuha 381-113) is silver.
- Saha 381-223 has other cars at the end of the roof car near Okayama. It reproduces the appearance with more ventilators lined up than the original, and the window arrangement with the small window of the former smoking room.
- Kuha 381-113 has a sign holder, a white background destination sign, and a cut-out car number, reproducing the original form.
- The intermediate coupling section and the front section of Kumoha 381-506 use a body-mounted close-coupled coupler without a hook.
- The use of a slotless motor achieves smooth and quiet running.
- KATO's unique car body pendulum mechanism reproduces the inward tilt of the car body when passing through curves like the real car.
- The nickname display uses a convertible train mark. Two types are included: "Yakumo (wide)" and "Yakumo (narrow)".
- Destination display stickers are included. "Limited Express Yakumo Okayama" and "Limited Express Yakumo Izumo City" are included. LED side destination display and curtain-type side destination display for Kuha 381-113 are created separately.
- DCC friendly
Compatible with interior lighting kit Kato 11-211 (11-212)