Taking over the original "Blue Train" 20 series, the "New Blue Train", the leading trains that caused an unprecedented "Bretre boom" in the Showa 50s, are returning. The sleeper limited express "Fuji", which was introduced into the sleeper limited express group of the Tokaido Main Line by adding a new private A-sleeper Orone 25 to the double-tier sleeper series 25 passenger car, was the object of admiration of boys at that time, connecting the longest mileage in the Japan at the time (1574.2 km between Tokyo and Nishi-Kagoshima) in more than 24 hours.

KATO will deliver the 24 series 25 limited express sleeper passenger cars that ran from the Tokyo metropolitan area on the Tokaido and Sanyo Main Lines and connected cities throughout Kyushu with the silver belt specifications of the time.