Definitely Taiwan. From Google:
"Three standard Japanese 3ft 6 in gauge designs working in Taiwan. Left Railway Class DT595 2-8-0 (Japanese National Railway 9600 Class); center, a Class CT192 Mogul (JNR Class 8620); right, a Class DT673 Mikado (JNR Class D51)-1,100 of these mixed-traffic 2-8-2s were built between 1936~45."