# Tōyō Rapid Railway Line

The Tōyō Rapid Railway Line (東葉高速線, Tōyō Kōsoku-sen) is a rapid transit line owned by the third-sector company Tōyō Rapid Railway Co., Ltd., which runs between Nishi-Funabashi Station in Funabashi, Chiba and Tōyō-Katsutadai Station in Yachiyo, Chiba. The name Tōyō (東葉) comes from the characters for Tokyo and Chiba. The line functions as an extension of the Tokyo Metro Tōzai Line, with a through service between the two lines.
Of the 16.2km line, approximately 5.9 km (37%) is in underground tunnel, 9.5 km (59%) is on bridges (viaducts), and 0.8 km (4%) is elevated.

## Operation

Every train on the Toyo Rapid Railway (other then depot workings between Yachiyo-Midorigaoka and Toyo-Katsutadai) operates a through service with the Tokyo Metro Tōzai Line. However, as Tōyō Rapid Railway rolling stock (the Tōyō Rapid 2000 series) is not equipped with ATS-P, they must terminate at Nakano and cannot continue onto the Chūō–Sōbu Line, which uses ATS-P. Similarly, the Chūō–Sōbu Line's E231-800 series sets must terminate at Nishi-Funabashi as they lack the WS-ATC safety system the Tōyō Rapid Railway Line uses. Tokyo Metro vehicles can operate on all three lines.

### Current train services

There are three train service types on the Tōyō Rapid Railway, however all trains stop at every station the Tōyō Rapid Railway Line. As such, the service type only refers to the stops made on the Tokyo Metro Tōzai Line.

#### Rapid (快速)

Operates between Tōyō-Katsutadai and Nakano (the western terminus of the Tōzai Line), with some services extending to Mitaka. The majority of services on the Toyo Rapid Railway use this service. While it stops at every station on the Tōyō Rapid Railway Line, the section between Nishi-Funabashi and Tōyōchō on the Tokyo Metro Tōzai Line is non-stop except for a stop at Urayasu, then the service stops at all stations west of Tōyōchō. Most morning and afternoon trains go direct to Mitaka on the Chūō–Sōbu Line.

#### Commuter Rapid (通勤快速)

Like the Rapid Service, it also operates between Tōyō-Katsutadai and Nakano stations and in the morning and afternoon to Mitaka, and stops at every station on the Tōyō Rapid Railway Line. Only operates in the "up" direction on mornings towards Nakano. It is non-stop between Nishi-Funabashi and Urayasu before stopping at every station west of Urayasu.

#### Local (各駅停車)

This service only operates on rush hours when services on the Tokyo Metro Tōzai Line make through services with the Tōyō Rapid Railway Line, and sometimes goes to Mitaka station on the Chūō–Sōbu Line. This service stops at all stations on the Tōyō Rapid Railway Line, Tokyo Metro Tōzai Line and the Chūō–Sōbu Line.

### Former services
#### Tōyō Rapid (東葉快速)

From the revised timetable on the 4 December 1999, the "Toyo Rapid" service was created. It stopped at Nishi-Funabashi, Kita-Narashino, Yachiyo-Midorigaoka and Tōyō-Katsutadai. Due to congestion on tracks, on March 14, 2009, the timetable changed to have 4 evening "up" bound Tōyō Rapid trains, thus the "down" service towards Tōyō-Katsutadai was abolished. Due to passenger counts increasing on stops that the Tōyō Rapid did not stop at, the Tōyō Rapid service was completely abolished on the March 14, 2014 timetable change.

## Stations

* All services stop at every station.
| No. | Name | Japanese | Transfers | Location | Location |
| ↑ Through-service to/from Mitaka via the T Tokyo Metro Tozai Line and JB Chūō Line (Local) ↑ ||||||
| TR01 | Nishi-Funabashi | 西船橋 | T Tokyo Metro Tozai Line (T-23) JB Chūō-Sōbu Line (JB30) JM Musashino Line (JM10) | Funabashi | Chiba |
| TR02 | Higashi-Kaijin | 東海神 | | Funabashi | Chiba |
| TR03 | Hasama | 飯山満 | | Funabashi | Chiba |
| TR04 | Kita-Narashino | 北習志野 | SL Shin-Keisei Line (SL19) | Funabashi | Chiba |
| TR05 | Funabashi-Nichidaimae | 船橋日大前 | | Funabashi | Chiba |
| TR06 | Yachiyo-Midorigaoka | 八千代緑が丘 | | Yachiyo | Chiba |
| TR07 | Yachiyo-Chūō | 八千代中央 | | Yachiyo | Chiba |
| TR08 | Murakami | 村上 | | Yachiyo | Chiba |
| TR09 | Tōyō-Katsutadai | 東葉勝田台 | KS Keisei Main Line (Katsutadai Station: KS31) | Yachiyo | Chiba |
* ↑ Nishi-Funabashi is shared by Tōyō Rapid Railway, JR East and Tokyo Metro; Tokyo Metro manages the station.

## Rolling stock

* Tōyō Rapid 2000 series (only go as far as Nakano, due to lack of ATS-P)
* Tokyo Metro 05/05N series
* Tokyo Metro 07 series
* Tokyo Metro 15000 series
* Toyo Rapid 2000 series
* Tokyo Metro 05 series
* Tokyo Metro 05N series
* Tokyo Metro 07 series
* Tokyo Metro 15000 series

### Former

* Tōyō Rapid 1000 series (retired in 2006)
* Tokyo Metro 5000 series (retired in 2007)
* Toyo Rapid 1000 series, September 2006
* Tokyo Metro 5000 series, December 2006

## History

Construction work on the line commenced in July 1984, and the line was fully opened on 27 April 1996. Limited-stop "Toyo Rapid" (東葉快速, Tōyō Kaisoku) services were introduced on the line from the start of the 4 December 1999 timetable revision. Such services in the "up" direction (toward Tokyo) were discontinued in 2009, and the "down" limited-stop services were discontinued from the start of the revised timetable on 15 March 2014.