Osaka Metro Chūō Line
| Osaka Metro Chūō Line | |||
|---|---|---|---|
A Chūō Line 400 series EMU | |||
| Overview | |||
| Other name(s) | Yumeshima | ||
| Owner | Osaka Municipal Transportation Bureau (Ōsakakō — Nagata) Osaka Port Transport System Co., Ltd. (Yumeshima — Ōsakakō) | ||
| Line number | 4 | ||
| Locale | Osaka and Higashiosaka | ||
| Termini | |||
| Stations | 15 | ||
| Color on map | Green (#019A66) | ||
| Service | |||
| Type | Rapid transit | ||
| System | Osaka Metro | ||
| Operator(s) | Osaka Metro (2018–present) Osaka Municipal Transportation Bureau (1961–2018) | ||
| Depot(s) | Morinomiya | ||
| History | |||
| Opened | 11 December 1961 | ||
| Last extension | 19 January 2025 | ||
| Technical | |||
| Line length | 21.1 km (13.1 mi) | ||
| Track length | 21.1 km (13.1 mi) | ||
| Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge | ||
| Electrification | 750 V DC (Third rail) | ||
| Operating speed | 95 km/h (59 mph) | ||
| Signalling | Automatic closed block | ||
| Train protection system | WS-ATC | ||
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The Osaka Metro Chūō Line (中央線, Chūō-sen) is a rapid transit system in Osaka, Japan, operated by Osaka Metro. The line runs east-westerly under Chūō Avenue (中央大通, Chūō Ōdōri). Its official name is Rapid Electric Tramway Line No. 4 (高速電気軌道第4号線), and in MLIT publications, it is written as Line No. 4 (Chūō Line) (4号線（中央線）). Station numbers are indicated by the letter C.
Together with the through operation to the Keihanna Line, the three lines have a unified nickname "Yumehanna" (ゆめはんな).
On 1 July 2005, Osaka City bought the Technoport Line (テクノポート線) from Cosmosquare to Osakakō of its subsidiary Osaka Port Transport System Co., Ltd. (大阪港トランスポートシステム), reducing fare to increase traffic. The section operationally became a part of the Chūō Line, but is however still owned by OTS.
The Chūō Line is the only line to connect to all other subway lines operated by the Osaka Metro, including the Nankō Port Town Line.