The 24-series 25-series Yume Kukan is a prototype vehicle created by JR East based on a new concept to meet the growing demand for sleeper trains. The three cars that were introduced in 1989 were manufactured by three vehicle manufacturers, and the interior was designed by three department stores.
The Orone 25-901 is a sleeper car with a luxurious interior with an "old new" theme, the Ohafu 25-901 is a lounge car with an art nouveau interior with an "intellectual space" theme, and the Osh 25-901 is a Parisian sleeper. The dining car has a post-modern interior inspired by a bistro, and each vehicle has its own distinct personality.
Because each car only has one car, regular operation is not possible, and they are used as temporary trains on the Hokutosei system.

- New production of 3 dream space vehicles
- New production of power supply car Mani 24-500
- Dummy coupler installed on Oshi 25 -
Ohafu 25 reproduces the current black paint condition of the undercarriage
- Train mark is pasted inside the sticker
- Oshi's Table lamp lighting type
●Pre-printed head mark for locomotive included
●Transfer sheet included for car number (excluding 3 Yume Kukan cars)
●Train mark is illuminated with white LED for realistic lighting

Vehicle
●Oshi 25-901
●Ohafu 25-901
●Orone 25-901
●Orone 25-500 ●Orohane 25-500
●
Orohane 24-550
●Mani 24-500

Accessories
●Runner parts: head mark
●Runner Parts: Antenna
●Parts: Bogie frame (for Oshi 25)
●Parts: Bogie frame (for Mani 24)
●Parts: Jumper plug (for Mani 24)
●Seal: Train mark
●Transfer sheet: Car number