# Iidabashi Station

Iidabashi Station (飯田橋駅, Iidabashi-eki) is a major interchange railway station which straddles Tokyo's Chiyoda, Shinjuku and Bunkyō wards. It was originally built as Iidamachi Station (albeit in a slightly different location), terminus of the then Kōbu Railway, precursor to today's Chūō Line. The Ōedo Line addition to the station in 2000 was designed by architect Makoto Sei Watanabe.

## Lines

Iidabashi Station is served by the following above-ground and subway lines.

### Above ground

* Chūō-Sōbu Line (JB16)

### Subway lines

* Tokyo Metro Tōzai Line (T-06)
* Tokyo Metro Yūrakuchō Line (Y-13)
* Tokyo Metro Namboku Line (N-10)
* Toei Ōedo Line (E-06)

## Station layout

The JR East station has one island platform, serving the up and down local lines; there is no platform for the parallel rapid double track (for longer-distance commuter and express Chūō Line trains). The station is located on the inside of the Outer Moat. It is elevated over Mejiro-dori, a major thoroughfare from the Imperial Palace towards Ikebukuro.

### JR East

| 1 | JB Chūō-Sōbu Line | for Ochanomizu, Akihabara, and Chiba |
| 2 | JB Chūō-Sōbu Line | for Yotsuya, Shinjuku, Nakano, and Mitaka |
* Chuo-Sobu Line platforms, 2022. The bypass tracks on the right are for rapid trains.

### Tokyo Metro

| 1 | T Tozai Line | for Ōtemachi, Nishi-Funabashi TR Toyo Rapid Railway Line for Tōyō-Katsutadai JB Chuo-Sobu Line for Tsudanuma |
| 2 | T Tozai Line | for Takadanobaba, Nakano JB Chuo-Sobu Line for Mitaka |
| 3 | Y Yūrakuchō Line | for Nagatachō, Yūrakuchō, Toyosu, and Shin-Kiba |
| 4 | Y Yūrakuchō Line | for Ikebukuro Seibu Ikebukuro Line for Hannō TJ Tobu Tojo Line for Shinrinkoen |
| 5 | N Namboku Line | for Komagome, Akabane-Iwabuchi SR Saitama Rapid Railway Line to Urawa-Misono |
| 6 | N Namboku Line | for Shirokane-takanawa and Meguro MG Meguro Line for Hiyoshi SH Tokyu Shin-Yokohama Line for Shin-Yokohama Station Sotetsu Main Line for Ebina via the Tokyu/Sotetsu Shin-Yokohama Line |
* Tozai Line platforms, 2022
* Yurakucho Line platforms, 2022
* Namboku Line platforms, 2022

### Toei

| 1 | E Ōedo Line | for Tochōmae |
| 2 | E Ōedo Line | for Ryōgoku and Daimon |
* Oedo Line platforms, 2022

## History

The present-day JR East station opened on 15 November 1928.
The station facilities of the Tozai, Namboku and Yurakucho Lines were inherited by Tokyo Metro after the privatization of the Teito Rapid Transit Authority (TRTA) in 2004.
In 2014, it was announced that the JR East platforms were to be moved and rebuilt approximately 200 m southwest to reduce platform gaps on a sharply curved section of the platform. The new platforms, along with a new west station building, opened on July 12, 2020. In 2022, a large-scale renovation and redevelopment of the station and its environs was launched. With completion scheduled for 2026, the "Iidabashi Station East Area Redevelopment Project" will add a 24-floor mixed-use building to the station complex, containing residential, commercial, and shopping space as well as restaurants.

## Passenger statistics

In fiscal 2013, the JR East station was used by an average of 91,196 passengers daily (boarding passengers only), making it the 46th-busiest JR East station. Over the same fiscal year, the Tokyo Metro station was used by an average of 173,224 passengers daily (exiting and entering passengers), making it the twelfth-busiest station operated by Tokyo Metro. In fiscal 2013, the Toei station was used by an average of 14,577 passengers daily (boarding passengers only). The average daily passenger figures for JR East and Tokyo Metro in previous years are as shown below.
| Fiscal year | JR East | Tokyo Metro |
| 2000 | 91,145 | |
| 2005 | 88,647 | |
| 2010 | 90,363 | |
| 2011 | 90,763 | 166,452 |
| 2012 | 91,359 | 169,830 |
| 2013 | 91,196 | 173,224 |
* Note that JR East figures are for boarding passengers only.
The Number of Passengers on Iidabashi as recorded by the East Japan Railway Company Trains in 2017-2022 was 20,197 (（単位　千人）).

## Surrounding area

Koishikawa Kōrakuen Garden can be reached by walking from this station. The Iidabashi district extends south and west of the station, and the Kagurazaka extends north and east. The station spans the Kanda River, which separates these two neighborhoods and at this point runs from the southwest towards the northeast.