G-K
- Gakkentoshi Line – 1500 V DC, 1067 mm (official name is Katamachi Line)
- Hachiko Line – 1500 V DC, 1067 mm (only section between Hachioji and Komagawa)
- Hakone Tozan Line – 1500 V DC, 1067 mm and 1435 mm
- Hankyu Kobe Line – 1500 V DC, 1435 mm
- Hankyu Kyoto Line – 1500 V DC, 1435 mm
- Hanwa Line – 1500 V DC, 1067 mm
- Hokuriku Main Line – 1500 V DC and 20 kV AC 60 Hz, 1067 mm
- Itsukaichi Line – 1500 V DC, 1067 mm
- JR Kobe Line – 1500 V DC, 1067 mm (officially part of Tōkaidō Main Line and Sanyō Main Line)
- Joetsu Line – 1500 V DC, 1067 mm
- Kagoshima Main Line – 20 kV AC 60 Hz, 1067 mm
- Kaigan Line – 1500v DC, 1435 mm, linear-motor-powered train
- Kansai Airport Line – 1500 V DC, 1067 mm
- Karasuma Line – 1500 V DC, 1435 mm
- Keihan Main Line – 1500 V DC, 1435 mm
- Keihin-Tohoku Line – 1500 V DC, 1067 mm (officially part of Tōkaidō Main Line and Tohoku Main Line)
- Kintetsu Kyoto Line – 1500 V DC, 1435 mm
- Kintetsu Minami-Osaka Line – 1500 V DC, 1067 mm
- Kintetsu Nagano Line – 1500 V DC, 1067 mm
- Kintetsu Nagoya Line – 1500 V DC, 1435 mm
- Kintetsu Nara Line – 1500 V DC, 1435 mm
- Kintetsu Osaka Line – 1500 V DC, 1435 mm
- Kitakyushu monorail – 1500 V DC, Monorail
Read more about this topic: Railway Electrification In Japan