Hongō-sanchōme Station (本郷三丁目駅, Hongō-sanchōme-eki) is a railway station in Bunkyō, Tokyo, Japan, jointly operated by the Tokyo subway operators Tokyo Metro and Toei Subway. Part of the station originally lay within the Hongō-sanchōme district of Bunkyō Ward when the station was first opened, but following rezoning in 1965, the address of the station became Hongō-nichōme.

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M21 E08 Hongō-sanchōme Station 本郷三丁目駅
Exit 1 of Tokyo Metro in May 2022
General information
Location	Bunkyō, Tokyo Japan
Operated by	Tokyo Metro Toei Subway
Line(s)	M Marunouchi Line E Ōedo Line
Platforms	1 island platform (Ōedo Line) 2 side platforms (Marunouchi Line)
Tracks	4 (2 for each line)
Construction
Structure type	Underground
Other information
Station code	M-21, E-08
History
Opened	20 January 1954; 70 years ago (20 January 1954)
Services
Preceding station Tokyo Metro Following station Ochanomizu M20 towards Ogikubo or Hōnanchō Marunouchi Line Kōrakuen M22 towards Ikebukuro Preceding station Toei Subway Following station Kasuga E07 towards Tochōmae Ōedo Line Ueno-Okachimachi E09 towards Hikarigaoka
Location
Hongō-sanchōme Station Location within Special wards of Tokyo Show map of Special wards of Tokyo Hongō-sanchōme Station Hongō-sanchōme Station (Tokyo Bay and Bōsō Peninsula) Show map of Tokyo Bay and Bōsō Peninsula Hongō-sanchōme Station Hongō-sanchōme Station (Tokyo) Show map of Tokyo Hongō-sanchōme Station Hongō-sanchōme Station (Japan) Show map of Japan

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• Tokyo Metro Marunouchi Line, station number M-21
• Toei Ōedo Line, station number E-08

The station has two separate sections. There is no underground connection between the platforms, so transfers require surfacing and re-entering.^[1] It is easier to change at Kōrakuen.

• 20 January 1954: The Marunouchi Line station opens.
• 1 April 1965: The station address becomes Hongō-nichōme.
• 12 December 2000: The Toei Ōedo Line station opens.
• 1 April 2004: The station facilities of the Marunouchi Line were inherited by Tokyo Metro after the privatization of the Teito Rapid Transit Authority (TRTA) in 2004.^[2]