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JR Tōzai Line
207 series EMU
Overview
Native name	JR東西線
Owner	Kansai Rapid Railway Co., Ltd.
Locale	Osaka and Amagasaki
Termini	Kyōbashi Amagasaki
Stations	9
Service
Type	Commuter rail
System	Urban Network
Operator	JR West
Rolling stock	207 series EMU 321 series EMU
Daily ridership	233,577 (daily 2015)[1]
History
Opened	8 March 1997 (1997-03-08)
Technical
Line length	12.5 km (7.8 mi)
Num of tracks	Double-track
Track gauge	1,067 mm (3 ft 6 in)
Electrification	1,500 V DC (overhead lines)
Operating speed	90 km/h (56 mph)
Signalling	Automatic Closed block
Train protection system	ATS-P

The JR Tōzai Line (JR東西線, Jei-āru Tōzai-sen; lit. 'East-West Line') is one of several commuter rail lines and services in the Osaka-Kobe-Kyoto Metropolitan Area, operated by West Japan Railway Company (JR West). The line runs underground in an east-west direction through central Osaka and connects the Gakkentoshi Line at Kyobashi Station in Osaka and the JR Takarazuka Line and the JR Kobe Line at Amagasaki. All stations on this line are in the city of Osaka, except for the western terminus in Amagasaki, Hyōgo Prefecture.

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• Operators, distances: 12.5 km / 7.8 mi.
  • West Japan Railway Company (Category-2, Services)
  • Kansai Rapid Railway Co., Ltd. (Category-3, Tracks)
• Railway signalling: Automatic
• CTC centers: Ōsaka Operation Control Center
• CTC system: JR Takarazuka – JR Tozai – Gakkentoshisen traffic control system (JR west traffic control system)

Many trains are local services and stop at every station on the line, but rapid (快速) and regional rapid (区間快速) services that skip some stations are also operated. Some trains terminate at Amagasaki, but most westbound trains continue on the Kobe Line to Nishi-Akashi or on the Takarazuka Line to Tsukaguchi and Takarazuka. All eastbound trains continue past Kyobashi on the Gakkentoshi Line.

The line was initially proposed in 1971 by Japanese National Railways (JNR) as a link between the Katamachi Line, which connected Osaka to its eastern suburbs, and Fukuchiyama Line, which connected the city to its northwestern suburbs. Osaka's municipal government had maintained tight controls over transportation within the city, and most intercity lines terminated outside the city center. The line, provisionally known as Katafuku Line (片福線; Kata- from Katamachi, -fuku from Fukuchiyama), would give commuters a single-seat ride from the suburbs and an east-west connection through central Osaka.

A permit to lay the track was given 10 years later, but the project stopped because of JNR's financial problems.

In 1988, after JNR privatized and split into Japan Railway companies, West Japan Railway Company formed a private-public entity called Kansai Rapid Railway Co., Ltd. (関西高速鉄道株式会社, Kansai kōsoku tetsudō kabushiki gaisha) with the prefectural governments of Osaka and Hyōgo, and the cities of Osaka and Amagasaki.

The line was completed and opened as JR Tozai Line in 1997.

• 207 series (from 1991)
• 321 series (from 2005)

• JR Tozai Line