Italy
total: 19,729 km
standard gauge: 18,317 km 1.435-m gauge (12,458 km electrified)
narrow gauge: 123 km 1.000-m gauge (123 km electrified); 1,058 km
0.950-m gauge (151 km electrified); 231 km 0.850-m gauge (2008)
Japan
total: 23,506 km
standard gauge: 3,437 km 1.435-m gauge (3,319 km electrified)
narrow gauge: 20,059 km 1.067-m gauge (11,842 km electrified); 11 km
0.762-m gauge (11 km electrified) (2008)
Jordan
total: 507 km
narrow gauge: 507 km 1.050-m gauge (2008)
Kazakhstan
total: 13,700 km
broad gauge: 13,700 km 1.520-m gauge (3,700 km electrified) (2008)
Kenya
total: 2,778 km
narrow gauge: 2,778 km 1.000-m gauge (2008)
Korea, North
total: 5,235 km
standard gauge: 5,235 km 1.435-m gauge (3,500 km electrified) (2006)
Korea, South
total: 3,381 km
standard gauge: 3,381 km 1.435-m gauge (1,843 km electrified) (2008)
Kosovo
total: 430 km
standard gauge: 430 km 1.435-m gauge (2007)
Kyrgyzstan
total: 470 km
broad gauge: 470 km 1.520-m gauge (2008)
Latvia
total: 2,298 km
broad gauge: 2,265 km 1.520-m gauge
narrow gauge: 33 km 0.750-m gauge (2008)