These Mikados were based on the JF6 and were developed for industrial tasks. With a construction period up to 1999, they were the last large series-built steam locomotives in the world. There are reports that some locomotives were still in use in 2016 in open-pit mines or in heavy industry companies. Accordingly, an extraordinarily large number have survived to this day. Between 1989 and 1991 three US tourist railways ordered brand new locomotives of this type, one of which was lost at sea. One machine was also delivered to South Korea in 1994. 