A complex and interesting aspect of Japanese subways is how they conduct through-running with private railways and JR lines. The most extensive examples are in Tokyo where 10 of the 13 "official" subway lines participate.
The exceptions are the Tokyo Metro's Ginza and Marunouchi lines that use 3rd rail current collection and the TOEI Oedo subway that is linear motor powered. The other 10 subways use overhead current collection and run over 3 rail gauges; 1067mm, 1372mm and 1435mm.
TOKYO METRO SUBWAYS:
Chiyoda subway:
YOYOGI UEHARA to KITA AYASE, 20 stations, 24.0km
Through running:
West end, Odakyu Ry to HON ATSUGI and KARAKIDA
East end, JR Joban line to TORIDE
Rolling Stock: Chiyoda, Odakyu and JR
Hibiya subway:
NAKA MAGURO to KITA SENJU, 21 stations, 20.3km
Through running:
West end, Tokyu Ry to KIKUNA
East end, Tobu Ry to TOBU-DOBUTSU-KOEN
Rolling Stock: Hibiya, Tokyu, Tobu
Tozai subway:
NAKANO to NISHI FUNABASHI, 23 stations, 30.8km
Through running:
West end, JR Chuo line to MITAKA
East end, JR Sobu line to TSUDANUMA
and Toyo Rapid Ry to TOYO-KATSUTADAI
Rolling Stock: Tozai, JR, Toyo Rapid
Yurakucho subway:
WAKOSHI to SHIN KIBA, 24 stations, 28.3km
Through running:
West end, Tobu Ry to SHINRIN KOEN
East end, no through running
Rolling Stock: Yurakucho, Fukutoshin, Seibu, Tobu
Hanzoman subway:
SHIBUYA to OSHIAGE, 14 stations, 16.8km
(Tokyu Ry subway continues to FUTAKO TAMAGAWA, 6 stations, 9.4km)
Through running:
West end, Tokyu Ry to CHUO RINKAN
East end, Tobu Ry to MINAMI-KURIHASHI
Rolling Stock: Hanzomon, Tokyu, Tobu
(Tōkyū CHUO-RINKAN to Tōbu MINAMI-KURIHASHI is 98.5 km).
Namboku subway*:
MEGURO to AKABANE-IWABUCHI, 19 stations, 21.3km
Through running:
West end, Tokyu Ry to MUSASHI-KOSUGI
East end, Saitama Ry to URAWA-MISONO
Rolling Stock: Namboku, Saitama, Tokyu
Fukutoshin subway**:
WAKOSHI to SHIBUYA, 16 stations, 20.2km
Through running:
North end, Tobu Ry to KAWAGOESHI and Seibu Ry to HANNO
South end (starting in 2012), Tokyu Ry and Minato Mirai subway to MOTOMACHI-CHUKAGAI
* The Namboku subway shares the 2.3km section of track between SHIROKANE-TAKANAWA and SHIBUYA with the TOEI Mita line.
** Fukutoshin line trains run on tracks of the Tobu Ry, the Yurakucho subway, it's own subway, the Seibu Ry, the Tokyu Ry and the Minato Mirai subway in Yokohama - three railways and three subways.
TOEI Subways:
Asakusa subway:
NISHI MAGOME to OSHIAGE, 20 stations, 18.3km
Through running:
South end, Keikyu Ry to HANEDA KUKO (airport) and MISAKI GUCHI
East end, Keisei Ry to HIGASHI NARITA and NARITA KUKO (airport)
Keisei Ry to INBA-NIHON-IDAI
Shibayama Ry to SHIBAYAMA-CHIYODA
Mita subway:
NISHI TAKASHIMA DAIRA to MEGURO, 27 stations, 26.5km
Through running:
North end, no through running
South end, Tokyu Ry to MUSASHI-KOSUGI
Shinjuku subway:
SHINJUKU to MOTOYAWATA, 21 stations, 23.5km
Through running:
West end, Keio Ry to HASHIMOTO and TAKAOSAN GUCHI
East end, no through running
The exceptions are the Tokyo Metro's Ginza and Marunouchi lines that use 3rd rail current collection and the TOEI Oedo subway that is linear motor powered. The other 10 subways use overhead current collection and run over 3 rail gauges; 1067mm, 1372mm and 1435mm.
TOKYO METRO SUBWAYS:
Chiyoda subway:
YOYOGI UEHARA to KITA AYASE, 20 stations, 24.0km
Through running:
West end, Odakyu Ry to HON ATSUGI and KARAKIDA
East end, JR Joban line to TORIDE
Rolling Stock: Chiyoda, Odakyu and JR
Hibiya subway:
NAKA MAGURO to KITA SENJU, 21 stations, 20.3km
Through running:
West end, Tokyu Ry to KIKUNA
East end, Tobu Ry to TOBU-DOBUTSU-KOEN
Rolling Stock: Hibiya, Tokyu, Tobu
Tozai subway:
NAKANO to NISHI FUNABASHI, 23 stations, 30.8km
Through running:
West end, JR Chuo line to MITAKA
East end, JR Sobu line to TSUDANUMA
and Toyo Rapid Ry to TOYO-KATSUTADAI
Rolling Stock: Tozai, JR, Toyo Rapid
Yurakucho subway:
WAKOSHI to SHIN KIBA, 24 stations, 28.3km
Through running:
West end, Tobu Ry to SHINRIN KOEN
East end, no through running
Rolling Stock: Yurakucho, Fukutoshin, Seibu, Tobu
Hanzoman subway:
SHIBUYA to OSHIAGE, 14 stations, 16.8km
(Tokyu Ry subway continues to FUTAKO TAMAGAWA, 6 stations, 9.4km)
Through running:
West end, Tokyu Ry to CHUO RINKAN
East end, Tobu Ry to MINAMI-KURIHASHI
Rolling Stock: Hanzomon, Tokyu, Tobu
(Tōkyū CHUO-RINKAN to Tōbu MINAMI-KURIHASHI is 98.5 km).
Namboku subway*:
MEGURO to AKABANE-IWABUCHI, 19 stations, 21.3km
Through running:
West end, Tokyu Ry to MUSASHI-KOSUGI
East end, Saitama Ry to URAWA-MISONO
Rolling Stock: Namboku, Saitama, Tokyu
Fukutoshin subway**:
WAKOSHI to SHIBUYA, 16 stations, 20.2km
Through running:
North end, Tobu Ry to KAWAGOESHI and Seibu Ry to HANNO
South end (starting in 2012), Tokyu Ry and Minato Mirai subway to MOTOMACHI-CHUKAGAI
* The Namboku subway shares the 2.3km section of track between SHIROKANE-TAKANAWA and SHIBUYA with the TOEI Mita line.
** Fukutoshin line trains run on tracks of the Tobu Ry, the Yurakucho subway, it's own subway, the Seibu Ry, the Tokyu Ry and the Minato Mirai subway in Yokohama - three railways and three subways.
TOEI Subways:
Asakusa subway:
NISHI MAGOME to OSHIAGE, 20 stations, 18.3km
Through running:
South end, Keikyu Ry to HANEDA KUKO (airport) and MISAKI GUCHI
East end, Keisei Ry to HIGASHI NARITA and NARITA KUKO (airport)
Keisei Ry to INBA-NIHON-IDAI
Shibayama Ry to SHIBAYAMA-CHIYODA
Mita subway:
NISHI TAKASHIMA DAIRA to MEGURO, 27 stations, 26.5km
Through running:
North end, no through running
South end, Tokyu Ry to MUSASHI-KOSUGI
Shinjuku subway:
SHINJUKU to MOTOYAWATA, 21 stations, 23.5km
Through running:
West end, Keio Ry to HASHIMOTO and TAKAOSAN GUCHI
East end, no through running