(click to enlarge)
Overview over the areas covered by the JR companies (click to enlarge)
JR East Japan (JR Higashi Nihon) operates JR trains on the Japanese main island (Honshû) in the three regions Kantô, Yamanashi/Nagano/Niigata (referred to as the Kô-Shin-Etsu area (1)), and Tôhoku. The Kantô area has the city of Tôkyô at its centre and includes the Prefectures of Chiba (with the city of Chiba), Kanagawa (with the city of Yokohama), Saitama, Ibaraki, Tochigi and Gumma. The Tôkaidô Shinkansen from Shin Ôsaka in the west via Kyôto and Nagoya into Tôkyô, however, is operated by JR Tôkai. In Nagano Prefecture JR East Japan has borders with JR Tôkai. The Hokuriku Shinkansen is operated jointly by JR East Japan and JR West Japan, the territorial border being the station of Jôetsu Myôkô; personnel changes at Nagano. In the north the border between JR East Japan (1067 mm gauge) and JR Hokkaidô lies just north of Kanita at the Shin Naka-Oguni signal post; the Hokkaidô Shinkansen (1435 mm gauge), however, already starts at Shin Aomori.
(1) Kô 甲 stands for the old province of Kai 甲斐 , today Yamanashi Prefecture, Shin 信 stands for the old province of Shinano 信濃 , today Nagano Prefecture, Etsu 越 stands for the old province of Echigo 越後 , today Niigata Prefecture。
The JR East Japan lines are presented here in 5 sections:
✳ A1 The urban network system around Tôkyô/Yokohama/Chiba (shorter distances)
> These lines are operated by trains of the tsûkin-gata 通勤形type、i.e. "commuter train" type. They have 4 side-doors.
3 Chûô-sen (rapid service) (for the Ôme-sen Tachikawa - Ôme and Ôme - Okutama see: "Individual Lines in the Wider Kantô Area": Ôme-sen)
13 Saikyô-sen (continuing over the Rinkai Tokyo Waterfront Area Rapid Transit Line / continuing to Ebina via the Sôtetsu Company. The Saikyô-sen includes the eastern section of the Kawagoe-sen (Kawagoe - Ômiya, 13/1)
(grey) other JR East Japan lines
✦ A2 The urban network system around Tôkyô/Yokohama/Chiba (long distance services) (In my map lines 101 to 104)
> These lines are operated by trains of the kinkô-gata 近郊形type、i.e. "trains for the surrounding country/districts". They have 3 side-doors.
a Takasaki b Utsunomiya c Mito d Ômiya e Akabane
f Shinjuku g Ueno h Shinagawa k Yokohama m Atami
n Narita Kûkô (Narita International Airport) p Chiba
Ueno Tôkyô Line, Shônan Shinjuku Line and Sôbu Yokosuka-sen trains between Yokohama and Ôfuna use the Tôkaidô Honsen via Totsuka.
Ueno Tôkyô Line trains between Akabane and Ueno use the line passing through Oku station.
Another map of lines 101 to 104 (my numbering)
P01 Ochanomizu P02 Nippori P03 Tabata P04 Ômori P05 Nishi Ôi
P06 Musashi Kosugi P07 Tsurumi P08 Higashi Kanagawa P09 Sakuragichô
P10 Negishi P11 Isogo P12 Fujisawa P13 Kamakura P14 Yokosuka
P15 Hazawa Yokohama Kokudai P16 Nagatsuta P17 Machida P18 Noborito
P19 Fuchû Honmachi P20 Kokubunji P21 Mitaka P22 Nakano P23 Toda
P24 Musashi Urawa P25 Urawa P26 Kita Senju P27 Matsudo
P28 Kinshichô P29 Shin Koiwa P30 Shin Kiba
☫ B Individual lines in the wider Kantô area and
☃ C Individual lines in the Kô-Shin-Etsu area
✦ 1435mm gauge:
A1 Tôkaidô Shinkansen (JR Tôkai ➔see JR Tôkai)
A3 Jôetsu Shinkansen (NOTE: The Jôetsu Shinkansen links the Kantô area to Niigata Prefecture in the Kô-Shin-Etsu area)
A4 Hokuriku Shinkansen (Tôkyô-Jôetsu Myôkô [-Kanazawa-Tsuruga]) (NOTE: the section Karuizawa - Nagano - Jôetsu Myôkô is in the Kô-Shin-Etsu area)
✦ 1067mm gauge:
-) Kantô area:
✲ D Individual lines in the Tôhoku area
✱ 1435mm gauge:
A2 Hokkaidô Shinkansen (JR Hokkaidô)
✱ 1067mm gauge and 1435mm gauge local lines:
x1 Tsugaru Tetsudô x2 Towada Kankô Dentetsu x3 Kônan Tetsudô lines x4 Sanriku Tetsudô lines x5 Sendai Kûkô Tetsudô x6 Abukuma Kyûkô x7 Fukushima Kôtsû Iisaka-sen x8 Yamagata Tetsudô x9 Aizu Tetsudô x10 Yagan Tetsudô x11 Tôbu Tetsudô x12 Yuri Kôgen Tetsudô x13 Akita Nairiku Jûkan Tetsudô