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| Osaka Metro Chūō Line | |||
|---|---|---|---|
 | |||
 A Chūō Line 400 series EMU | |||
| Overview | |||
| Other name | Yumeshima | ||
| Owner | Osaka Municipal Transportation Bureau (Ōsakakō — Nagata) Osaka Port Transport System Co., Ltd. (Yumeshima — Ōsakakō) | ||
| Line number | 4 | ||
| Locale | Osaka andHigashiosaka | ||
| 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; 63 years ago (1961-12-11) | ||
| Last extension | 19 January 2025; 10 months ago (2025-01-19) | ||
| 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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TheOsaka Metro Chūō Line (中央線,Chūō-sen) is arapid transit system inOsaka, Japan, operated byOsaka Metro. The line runs east-westerly under Chūō Avenue (中央大通,Chūō Ōdōri). Its official name isRapid Electric Tramway Line No. 4 (高速電気軌道第4号線), and inMLIT publications, it is written asLine No. 4 (Chūō Line) (4号線（中央線）). Station numbers are indicated by the letterC.
Together with the through operation to theKeihanna 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 theNankō Port Town Line.
The line (initially known as Line No. 4) opened on 11 December 1961, initially running between Ōsakakō and Bentenchō (this was the first elevated portion of the Osaka subway system); trains were initially composed of single-car trainsets, with occasional use of three-car trainsets during trade fairs held near Asashiobashi.[1] Between 1964 and 1985, the line was expanded towards Nagata in four stages:
On 18 December 1997, the OTS Technoport Line opened between Ōsakakō and Cosmosquare. This line was absorbed into the Chūō Line on 1 July 2005. The Keihanna Line was extended further into Nara when the extension to Gakken Nara-Tomigaoka opened on 27 March 2006. On 19 January 2025, the first phase of the OTS Hokkō Technoport Line opened toYumeshima Station in preparation forExpo 2025 to be held on the artificial island ofYumeshima.[2][3]
TheOTS Hokkō Technoport Line [ja] is a planned extension of the Chūō Line from Cosmosquare onSakishima [ja] toYumeshima,Maishima Sports Island andSakurajima [ja]. Phase 1, consisting of a one-stop extension toYumeshima Station, opened on 19 January 2025, ahead of the opening of theOsaka 2025 Expo.
Separately, a new station is planned to be built on the spur track to the Morinomiya depot facility as part of local revitalization efforts and also to serve the new Morinomiya campus ofOsaka Metropolitan University, with a projected completion date of 2028.[4]
| No. | Station | Japanese | Distance (km) | Transfers | Location |
|---|---|---|---|---|---|
| C 09 | Yumeshima | 夢洲 | 0.0 | Konohana-ku, Osaka | |
| C 10 | Cosmosquare | コスモスクエア | 3.2 |  Nankō Port Town Line (P09) | Suminoe-ku, Osaka |
| C 11 | Ōsakakō (Tempozan) | 大阪港 （天保山） | 5.6 | Minato-ku, Osaka | |
| C 12 | Asashiobashi | 朝潮橋 | 7.1 | ||
| C 13 | Bentenchō | 弁天町 | 8.7 | OOsaka Loop Line | |
| C 14 | Kujō | 九条 | 10.0 |  Hanshin Namba Line | Nishi-ku, Osaka |
| C 15 | Awaza | 阿波座 | 11.5 |  Sennichimae Line (S13) | |
| C 16 | Hommachi (Semba-nishi) | 本町 （船場西） | 12.6 |
| Chūō-ku, Osaka |
| C 17 | Sakaisuji-Hommachi (Semba-higashi) | 堺筋本町 （船場東） | 13.3 |  Sakaisuji Line (K15) | |
| C 18 | Tanimachi Yonchōme | 谷町四丁目 | 14.3 |  Tanimachi Line (T23) | |
| C 19 | Morinomiya | 森ノ宮 | 15.6 | ||
| C 20 | Midoribashi | 緑橋 | 16.8 |  Imazatosuji Line (I20) | Higashinari-ku, Osaka |
| C 21 | Fukaebashi | 深江橋 | 17.9 | ||
| C 22 | Takaida | 高井田 | 19.3 | FOsaka Higashi Line | Higashiosaka |
| C 23 | Nagata | 長田 | 21.1 | CKeihanna Line | |
| ↓Through services to/fromGakken Nara-Tomigaoka Station via theCKeihanna Line ↓ | |||||
All rolling stock have a maximum service speed limit of 95 km/h (59 mph), which is achievable on the Yumeshima–Ōsakakō section as well as on the Keihanna Line, while the Ōsakakō–Nagata section has the standard subway speed limit of 70 km/h (43 mph). In addition, all rolling stock are equipped withretarders to negotiate the continuous gradients of the Ikoma Tunnel of the Keihanna Line.
The Osaka Metro rolling stock are stored at Morinomiya Depot, while the Kintetsu Railway rolling stock are based at Higashi-Hanazono and Tomigaoka Depots located on the Keihanna Line. Since 2016, after heavier repairs and maintenance of all third-rail-powered Osaka Metro rolling stock have been consolidated at Midorigi Depot on theYotsubashi Line, Chūō Line rolling stock owned by Osaka Metro are also able to access said depot via a newly-built spur track located before Hommachi Station.
| Shinkansen | |
|---|---|
 JR West | |
 Osaka Metro | |
 Kobe Municipal Subway | |
 Kyoto Municipal Subway | |
 Hankyu | |
 Hanshin | |
 Keihan | |
 Nankai | |
 Kintetsu | |
 Shintetsu | |
| Other heavy rail lines | |
| Light metros and monorails | |
| Tram and light rails |
|
| Hinterland | |
| Funiculars andaerial lifts | |
| Public ferries |
|
| Major terminals | |
| Miscellaneous | |
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