# Sōbu Line (Rapid)

The Sōbu Line (Rapid) (Japanese: 総武快速線, romanized: Sōbu-kaisoku-sen) is a railway service on the Sōbu Main Line in Tokyo and Chiba Prefecture, Japan, operated by East Japan Railway Company (JR East). It connects Tokyo Station in Chūō, Tokyo with Chiba Station in Chūō-ku, Chiba via the cities of Ichikawa, Funabashi, and Narashino.

## Services

Rapid services on the Sōbu Line are primarily operated between Tokyo and Chiba, although there are many through services onto the Yokosuka Line as well as some through services operated from the Yokosuka Line via Tokyo terminating at Tsudanuma. During weekday morning peak periods Tokyo-bound trains arrive once every 3.2 minutes; this is reduced to 10 Chiba-bound trains per hour during weekday evening peak periods. At other times there are approximately six trains per hour. There are many through services operated onto other lines.
For information on the Narita Express, Shiosai, and other limited express services, see their respective articles.
Sōbu Line (Rapid) trains travel through onto the Yokosuka Line to Ōfuna, Zushi, and Kurihama. Trains also travel through beyond Chiba to as far as:
* Kazusa-Ichinomiya on the Sotobō Line
* Kimitsu on the Uchibō Line
* Narita Airport via Narita on the Narita Line
* Kashima-Jingū on the Kashima Line
* Narutō on the Sōbu Main Line

### Past services
#### Home Liner Chiba

Before 16 March 2019, there were five Home Liner Chiba commuter liner services that operated every weekday evening, four of which started from Tokyo and another which started at Shinjuku.
Stations served:
(Shinjuku – Akihabara) / Tokyo – Tsudanuma – Inage – Chiba

#### Commuter Rapid

Commuter Rapid services were abolished with the timetable revision on 12 March 2022. Prior to this they ran on weekday peak hours only, stopping at Tōkyō, Shin-Nihombashi, Bakurochō, Kinshichō, Funabashi, and Chiba.

## Station list

* For information on local services between Kinshichō and Chiba, see the Chūō-Sōbu Line article.
* All rapid trains stop at all stations listed below.
| Station No. | Station | Japanese | Distance (km) | Distance (km) | Transfers | Location | Location |
| Station No. | Station | Japanese | Between stations | Total | Transfers | Location | Location |
| Through services to JO Yokosuka Line for Yokohama, Ofuna, Kamakura, Zushi and Kurihama ||||||||
| TYOJO19 | Tokyo | 東京 | - | 0.0 | JO Yokosuka Line (Mostly through service) Tōhoku, Yamagata, Akita and Hokkaido Shinkansen Jōetsu and Hokuriku Shinkansen JC Chūō Line (JC01) JY Yamanote Line (JY01) JK Keihin-Tōhoku Line (JK26) JT Tōkaidō Line (JT01) JU Ueno–Tokyo Line JE Keiyō Line (JE01) Tōkaidō Shinkansen M Tokyo Metro Marunouchi Line (M-17) T Tokyo Metro Tozai Line (Otemachi: T-09) | Chiyoda | Tokyo |
| JO20 | Shin-Nihombashi | 新日本橋 | 1.2 | 1.2 | G Tokyo Metro Ginza Line (Mitsukoshimae: G-12) Z Tokyo Metro Hanzomon Line (Mitsukoshimae: Z-09) | Chūō | Tokyo |
| JO21 | Bakurochō | 馬喰町 | 1.1 | 2.3 | A Toei Asakusa Line (Higashi-nihombashi: A-15) S Toei Shinjuku Line (Bakuroyokoyama: S-09) | Chūō | Tokyo |
| JO22 | Kinshichō | 錦糸町 | 2.5 | 4.8 | JB Chūō-Sōbu Line (JB22) Z Tokyo Metro Hanzomon Line (Z-13) | Sumida | Tokyo |
| JO23 | Shin-Koiwa | 新小岩 | 5.2 | 10.0 | JB Chūō-Sōbu Line (JB25) | Katsushika | Tokyo |
| JO24 | Ichikawa | 市川 | 5.4 | 15.4 | JB Chūō-Sōbu Line (JB27) | Ichikawa | Chiba |
| JO25 | Funabashi | 船橋 | 7.8 | 23.2 | JB Chūō-Sōbu Line (JB31) TD Tobu Urban Park Line (TD35) KS Keisei Main Line (Keisei Funabashi: KS22) | Funabashi | Chiba |
| JO26 | Tsudanuma | 津田沼 | 3.5 | 26.7 | JB Chūō-Sōbu Line (JB33) SL Shin-Keisei Line (Shin-Tsudanuma: SL23) | Narashino | Chiba |
| JO27 | Inage | 稲毛 | 9.2 | 35.9 | JB Chūō-Sōbu Line (JB37) | Inage-ku, Chiba | Chiba |
| JO28 | Chiba | 千葉 | 3.3 | 39.2 | JB Chūō-Sōbu Line (JB39) ■ Sōbu Main Line (for Chōshi) ■ Narita Line ■ Sotobō Line ■ Uchibō Line Chiba Urban Monorail: Line 1, Line 2 KS Keisei Chiba Line (Keisei Chiba: KS59) | Chūō-ku, Chiba | Chiba |
| Through services to: ■ Sotobō Line for Kazusa-Ichinomiya ■ Uchibō Line for Kimitsu ■ Narita Line for Narita and Narita Airport Kashima Line for Kashima-Jingū via the Narita Line ■ Sōbu Main Line for Narutō ||||||||
Note: Special Rapid service was discontinued on 4 March 2017.

## Rolling stock
### Rapid service

* E235-1000 series (from 21 December 2020)

### Limited express service

* 255 series (Shiosai)
* E257 series (Shiosai)
* E259 series (Narita Express)

### Former rolling stock

* 113 series (from October 1980 to December 1999)
* E217 series (from December 1994 to March 2025)

## History

On 20 August 2016, station numbering was introduced with stations being assigned station numbers between JO19 and JO28. Numbers increase towards in the eastbound direction towards Chiba.