Yotsubashi Line
The Osaka Metro Yotsubashi Line (四つ橋線, Yotsubashi-sen) is an underground rapid transit line in Osaka, Japan, operated by Osaka Metro. The line connects Umeda, Hommachi, Yotsubashi, Namba, Daikokuchō and Suminoe, and runs parallel to the Midōsuji Line from Daikokuchō to Nishi-Umeda. Despite being the system's second line to open, its official name is Rapid Electric Tramway Line No. 3 (高速電気軌道第3号線), while the Osaka Municipal Transportation Bureau refers to it as Osaka City Rapid Railway Line No. 3 (大阪市高速鉄道第3号線), and in Ministry of Land, Infrastructure and Transport publications, it is written as Line No. 3 (Yotsubashi Line) (3号線（四つ橋線）). Station numbers are indicated by the letter Y.
| Osaka Metro Yotsubashi Line | |||
|---|---|---|---|
A refurbished Yotsubashi Line 23 series EMU in August 2012 | |||
| Overview | |||
| Status | Operational | ||
| Owner | Osaka Metro (2018–present) Osaka Municipal Transportation Bureau (1942–2018) | ||
| Line number | 3 | ||
| Locale | Osaka, Japan | ||
| Termini | |||
| Stations | 11 | ||
| Color on map | Ocean blue (#0078BE) | ||
| Service | |||
| Type | Rapid transit | ||
| System | Osaka Metro | ||
| Depot(s) | Midorigi, Morinomiya (located on Chuo Line) | ||
| Rolling stock | 23 series EMUs | ||
| History | |||
| Opened | 10 May 1942 | ||
| Last extension | 9 November 1972 | ||
| Technical | |||
| Line length | 11.4 km (7.1 mi) | ||
| Track length | 11.8 km (7.3 mi) | ||
| Number of tracks | Double-track | ||
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge | ||
| Electrification | 750 V DC (third rail) | ||
| Operating speed | 70 km/h (43 mph) | ||
| Signalling | Automatic closed block | ||
| Train protection system | WS-ATC | ||
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