東西線

There are four Tozai ("East-West") Lines in Japan.

On the Tokyo subway, the Eidan Tôzaisen runs from Nakano to Nishi-Funabashi, a total distance of 30.8 km. The segment from Takadanobaba to Kudanshita was completed in 1964, and the line reached its current length in 1969. During rush hours, several trains on the Tozai line run through to the Chuo Line and Sobu Line at either end. Unlike most Japanese subway lines, the Tozai Line also has rapid trains: these stop at every station until Toyocho, and then proceed to Nishi-Funabashi with only one stop at Urayasu.

The Tozai line runs underground until just west of Nishi-Kasai, and runs on the surface from there. From west to east, the stations are:

Station        Distance  Transfers                                       
Nakano                   Chuo Line
Ochiai            2.0
Takadanobaba      3.9    Seibu Railway, Yamanote Line
Waseda            5.6
Kagurazaka        6.8
Iidabashi         8.0    Yurakucho Line, Namboku Line, Oedo Line,
                         Chuo Line
Kudanshita        8.7    Hanzomon Line, Shinjuku Line
Takebashi         9.7
Otemachi         10.7    Marunouchi Line, Chiyoda Line, Hanzomon Line,
                         Mita Line
Nihonbashi       11.5    Ginza Line, Asakusa Line
Kayabacho        12.0    Hibiya Line
Monzennakacho    13.8    Oedo Line
Kiba             14.9
Toyocho          15.8
Minami-Sunamachi 17.0
Nishi-Kasai      19.7
Kasai            20.9
Urayasu          22.8
Minami-gyotoku   24.0
Gyotoku          25.5
Myoden           26.8
Baraki-Nakayama  28.9
Nishi-Funabashi  30.8    Toyo Railway, Musashino Line, Keiyo Line,
                         Sobu Line

Meanwhile, in Osaka, the Tôzaisen is a line operated by the West Japan Railway. It opened in 1997 to complete a long train line between Fukuchiyama and Nara: most trains on the line go well beyond the terminals at either end. Except for Amagasaki and Kyobashi, the entire line is underground, running beneath the densely-populated Kita area of Osaka. From west to east, you have:

Station        Distance  Transfers                                       
(from Takarazuka Line)
Amagasaki                Kobe Line
Kashima           2.2
Mitejima          3.9
Ebie              6.5    Osaka City Subway, Hanshin
Shin-Fukushima    7.7
Kita-Shinchi      8.9    Walking distance to Osaka Station and Umeda
Osaka Temmangu   10.3    Osaka City Subway
Osakajo-Kitazume 11.6
Kyobashi         12.5    Osaka City Subway, Osaka Loop Line,
                         Keihan Railway
(to Gakkentoshi Line)

Now, on the Kyoto City Subway, the Tozai Line is the main east-west artery, starting in Nakagyo and running through Higashiyama and Yamashina to Fushimi. It also opened for service in 1997. From west to east:

Station        Distance  Transfers                                       
Nijo                     Sagano Line
Nijojo-mae        0.8
Karasuma-Oike     1.6    Karasuma Line
Kyoto City Hall   2.5
Sanjo Keihan      3.0    Keihan Railway
Higashiyama       3.6
Keage             4.6
Misasagi          6.4    Keihan Railway
Yamashina         8.1    Keihan Railway, Biwako Line, Kosei Line
Higashino         9.2
Nagitsuji        10.2
Ono              11.5
Daigo            12.7

Finally, on the Sapporo City Subway, the Tôzaisen runs through the Nishi, Chuo, Shiroishi, and Atsubetsu wards of Sapporo. The Kotoni-Shiroishi segment opened in 1976; the eastern extension opened in 1982, and the western extension opened in 1999. From west to east:

Station        Distance  Transfers                                       
Miyanosawa
Hassamu-Minami    1.5
Kotoni            2.8
Nijuyonken        3.7
Nishi 28-chome    4.9
Maruyama Koen     5.7
Nishi 18-chome    6.6
Nishi 11-chome    7.5
Odori             8.5    Namboku Line, Toho Line
Bus Center Mae    9.3
Kikusui          10.4
Higashi-Sapporo  11.6
Shiroishi        12.7
Nango 7-chome    14.1
Nango 13-chome   15.2
Nango 18-chome   16.4
Oyachi           17.9
Hibarigaoka      18.9
Shin-Sapporo     20.1    Chitose Line