Kasumigaseki (Tokyo Metro)

Kasumigaseki (Tokyo Metro)
Name	Kasumigaseki Station
Native name	霞ヶ関駅
Native name lang	ja
Address	Chiyoda, Tokyo
Country	Japan
Operator	Tokyo Metro
Lines	Tokyo Metro Marunouchi Line, Tokyo Metro Hibiya Line, Tokyo Metro Chiyoda Line
Opened	1958 (Marunouchi), 1964 (Hibiya), 1972 (Chiyoda)
Code	M-15, H-07, C-09

Kasumigaseki (Tokyo Metro) Kasumigaseki Station is a major subway interchange in Chiyoda, Tokyo serving the Tokyo Metro Marunouchi Line, Tokyo Metro Hibiya Line, and Tokyo Metro Chiyoda Line. Located beneath the Kasumigaseki government district near Hibiya Park and the Imperial Palace (Tokyo), the station provides access to numerous ministries, corporate headquarters, and diplomatic missions. It functions as a nexus linking central Tokyo landmarks such as Ginza, Marunouchi, and Ueno with commuter hubs including Shinjuku, Shibuya, and Ikebukuro.

Overview

Kasumigaseki lies under the Kasumigaseki district adjacent to the National Diet Building, Hibiya Station, and Sakuradamon Station on routes that radiate toward Nakano, Kita-Ayase, and Ayase. Managed by Tokyo Metro, the station integrates with municipal services from the Ministry of Finance (Japan), Ministry of Foreign Affairs (Japan), Ministry of Justice (Japan), and Ministry of Health, Labour and Welfare. It serves commuters to corporations such as Mitsubishi Heavy Industries, Mizuho Financial Group, and Sumitomo Mitsui Banking Corporation, and is used by visitors to cultural sites like the Tokyo International Forum and National Theatre (Japan).

Lines and Services

The station is served by three Tokyo Metro lines: the Marunouchi Line (M-15) linking to Ikebukuro Station, Ogikubo Station, and Shinjuku Station; the Hibiya Line (H-07] connecting to Nakameguro Station, Kita-Senju Station, and Kasai-Rinkai Park Station; and the Chiyoda Line (C-09) providing through-services toward Yoyogi-Uehara Station, Nishi-Nippori Station, and Tobu-Dobutsu-Koen Station via interworking with Odakyu Electric Railway and JR East on connecting corridors. Rapid, local, and through-services are coordinated with timetable links to Tokyo Station, Ueno Station, and Hatchobori Station terminals via transfer points at Otemachi Station and Nijubashimae Station.

Station Layout and Facilities

The station features separate island platforms and side platforms on multiple subterranean levels, with vertical circulation supplied by escalators, elevators, and stairways linked to surface exits near Kasumigaseki Building, Sanno Park Tower, and Tokyo Garden Terrace Kioicho. Station facilities include ticketing machines compatible with Suica and PASMO, fare control gates, station staff offices, restrooms, and elevators compliant with accessibility standards used in stations such as Shibuya Station and Tokyo Metro Akasaka-mitsuke Station. Retail kiosks and convenience stores offer services similar to outlets found in Tokyo Station City, and signage follows standards set by the Tokyo Metropolitan Government and Japan Transport Safety Board recommendations.

History

The Marunouchi Line platforms opened in 1958 during the postwar expansion that included projects like Tōkaidō Shinkansen planning and urban redevelopment near Marunouchi. Hibiya Line service commenced in 1964, coinciding with the 1964 Summer Olympics in Tokyo, while Chiyoda Line platforms began operation in 1972 as part of the network growth era associated with projects like Expo '70 planning and the expansion of JR East suburban links. Over time the station underwent renovations paralleling upgrades at Tokyo Metro Ginza Line and Toei Subway stations, including seismic retrofitting inspired by lessons from the Great Hanshin earthquake and technology adoptions similar to those at Narita Airport Terminal 2·3 Station.

Passenger Statistics

Kasumigaseki is one of the busiest Tokyo Metro stations, with daily ridership numbers comparable to central stations such as Otemachi Station, Aoyama-itchome Station, and Kokkai-gijidomae Station. Passenger flows include ministry employees, corporate commuters from Shinagawa, tourists bound for Hibiya Park and the Imperial Palace, and transfer traffic to regional services operated by JR East and Keio Corporation. Annual ridership patterns reflect peaks during fiscal year periods aligned with Japanese fiscal year cycles and events at nearby venues like the Nippon Budokan and National Museum of Modern Art, Tokyo.

Surrounding Area and Connections

Immediate surroundings include the Kasumigaseki Building, Sanno Park Tower, Imperial Hotel, Tokyo, and government offices such as the Cabinet Secretariat (Japan), Atomic Energy Commission Secretariat, and the Financial Services Agency (Japan). Multiple bus routes connect to hubs like Tokyo Station, Shimbashi Station, and Roppongi Hills; taxi stands provide access to corporate campuses including Sony Building and Mitsubishi UFJ Financial Group offices. Nearby diplomatic missions include embassies to United States Embassy Tokyo and missions clustered in Akasaka and Minato, Tokyo.

Incidents and Safety Measures

Past incidents at central Tokyo stations influenced safety upgrades at Kasumigaseki, prompting installation of surveillance systems modeled after those in Shinjuku Station and emergency evacuation protocols coordinated with Tokyo Fire Department and the Metropolitan Police Department (Tokyo). Counterterrorism and disaster response planning involves agencies such as the National Police Agency (Japan), Japan Ground Self-Defense Force, and Tokyo Metropolitan Government disaster management units, with joint drills similar to exercises held at Haneda Airport and Narita International Airport. Platform markings, automated announcements, and barrier-free evacuation routes reflect standards from the Ministry of Land, Infrastructure, Transport and Tourism and lessons from incidents like the 1995 Tokyo subway sarin attack to enhance passenger safety.

Category:Tokyo Metro stations Category:Chiyoda, Tokyo