Chūō Line (Osaka)
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Chūō Line 20 series EMU
|System||Osaka Municipal Subway|
|Locale||Osaka and Higashiosaka|
|Opening||December 11, 1961|
|Owner||Osaka Municipal Transportation Bureau (Osakako — Nagata)
Osaka Port Transport System Co., Ltd. (Cosmosquare — Osakako)
|Operator(s)||Osaka Municipal Transportation Bureau|
|Line length||17.9 km (11.1 mi)|
|Track gauge||1,435 mm (4 ft 8 1⁄2 in)|
|Electrification||750 V DC, third rail|
|Operating speed||70 km/h (43 mph)|
The Chūō Line (大阪市営地下鉄中央線 Ōsaka-shiei-chikatetsu Chūō-sen?) is a rapid transit system in Osaka, Japan, operated by the Osaka Municipal Subway. 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?), while the Osaka Municipal Transportation Bureau refers to it as Osaka City Rapid Railway Line No. 4 (大阪市高速鉄道第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.
On July 1, 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 became a part of the Chūō Line, however is still owned by OTS.
The Chūō Line is the only line to connect to all other railway lines operated by the Osaka Municipal Transportation Bureau, including the Nankō Port Town Line.
- Above-ground section: after Awaza Station to Ōsakakō Station
- Block signalling: Automatic
- Train protection system: WS-ATC
- Cars per train: 6 (1984 – present)
- Maximum possible cars per train (platform length): 8
|C10||Cosmosquare||コスモスクエア||0.0||Nankō Port Town Line (P09)||Suminoe-ku, Osaka|
|C13||Bentenchō||弁天町||5.5||JR West: Osaka Loop Line|
|C14||Kujō||九条||6.8||Hanshin: Namba Line||Nishi-ku, Osaka|
|C15||Awaza||阿波座||8.3||Sennichimae Line (S13)|
|10.1||Sakaisuji Line (K15)|
|C18||Tanimachi Yonchōme||谷町四丁目||11.1||Tanimachi Line (T23)|
|C20||Midoribashi||緑橋||13.6||Imazatosuji Line (I20)||Higashinari-ku, Osaka|
|C22||Takaida||高井田||16.1||JR West: Osaka Higashi Line - Takaida-Chuo||Higashiosaka|
|C23||Nagata||長田||17.9||Kintetsu Keihanna Line (through to Gakken Nara-Tomigaoka Station)|
Osaka Municipal Subway
- 20 series (from 1984)
- 24 series (from 1991) (in green Osaka Municipal Transportation Bureau and blue Osaka Port Transport System (OTS) liveries)
The Osaka Municipal Subway trains are based at Morinomiya Depot, while the Kintetsu trains are based at Higashi-Hanazono and Tomigaoka Depots located on the Keihanna Line.
- 800 series (1961-1978)
- 900 series (1964-1978)
- 30 series (1967-1969, 1983-1995)
- 50 series (1969-1991)
The line opened on December 11, 1961, initially running between Ōsakakō and Bentenchō. Between 1964 and 1969, the line was expanded towards Nagata in four stages:
- October 31, 1964: Section between Bentenchō and Hommachi opens, with intermediate stations at Kujo and Awaza. The easternmost of these three stations would not open until July 1, 1969.
- July 29, 1968: The section between Morinomiya and Fukaebashi opens.
- December 6, 1969: The section between Hommachi and Morinomiya opens, with intermediate stations at Sakaisuji-Hommachi and Tanimachi 4-chome. Through service on the line is established.
- April 5, 1985: The section between Fukaebashi and Nagata opens.
- October 1, 1986: Through service to Ikoma commences as the Kintetsu Keihanna Line opens.
On December 18, 1997, the OTS Technoport Line opened between Ōsakakō and Cosmosquare. This line was absorbed into the Chūō Line on July 1, 2005. The Keihanna Line was extended further into Nara when the extension to Gakken Nara-Tomigaoka opened on March 27, 2006.
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