As speeds increased and trains got heavier with the introduction of steel passenger carriages, the Pashishi class became inadequate, and the Pashiko class was ordered as a replacement.

To boost the performance, cylinder size was increased and the fire grate was made larger.

With the introduction of the Pashiko class, of which eleven were built by the Shahekou Works in 1927 and 1928, the travel time of the Dalian–Changchun "Hato" express train dropped from 12 hours 30 minutes in 1929 to 10 hours 30 minutes in 1933.

Until the arrival of the streamlined Pashina class, these locomotives were the most emblematic of Mantetsu passenger service.

All eleven survived the war, with five having been assigned to the Dalian Railway Bureau, and six to the Fengtian Bureau at the end of the war, and were taken over by the Republic of China Railway.