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Station History & Timeline
51 Events
1889
4月11日
The station opened simultaneously with the opening of the Kobu Railway's Shinjuku - Tachikawa section and began handling passengers and freight.
Machine translation — show Japanese original
甲武鉄道新宿駅 - 立川駅間開通と同時に開業。旅客および貨物の取り扱いを開始。
1894
12月21日
The Kawagoe Railway, now the Seibu Kokubunji Line, opened.
Machine translation — show Japanese original
川越鉄道（現在の西武国分寺線）開業。
1906
10月1日
Kobu Railway was nationalized.
Machine translation — show Japanese original
甲武鉄道が国有化。
1909
10月12日
The line came under the jurisdiction of the Central East Line, later known as the Central Main Line from 1911.
Machine translation — show Japanese original
線路名称制定により中央東線（1911年から中央本線）の所属となる。
1910
The Tokyo Gravel Railway dedicated line, later known as the Shimokawara Line, opened.
Machine translation — show Japanese original
東京砂利鉄道専用線（後の下河原線）開業。
1920
5月25日
The Ministry of Railways acquired Tokyo Gravel Railway, and it became the Chūō Main Line freight branch line (Shimokawara Line) as of May 26 the following year.
Machine translation — show Japanese original
鉄道省が東京砂利鉄道を買収。翌5月26日付けで中央本線貨物支線（下河原線）となる。
1920
6月1日
Kawagoe Railway merged with Musashi Water and Electricity.
Machine translation — show Japanese original
川越鉄道が武蔵水電に合併。
1920
11月20日
The Chuo Line completed double-tracking and electrification work to this station and began operating electric trains.
Machine translation — show Japanese original
中央線、当駅まで複線電化工事完成、電車の運転を開始。
1921
12月1日
Japanese National Railways abolished the operation of the Shimokawara Line and the station became a siding within the station premises.
Machine translation — show Japanese original
国鉄、下河原線が営業を廃止、当駅構内側線扱いとなる。
1922
11月1日
Musashi Water and Electricity merged with Teikoku Electric Light.
Machine translation — show Japanese original
武蔵水電が帝国電灯に合併。
1922
11月16日
Teikō Denki transferred its iron and tramway business to Musashi Railway and was renamed the old Seibu Railway.
Machine translation — show Japanese original
帝国電灯が武蔵鉄道に鉄・軌道事業を譲渡、西武鉄道（旧）に改称。
1928
4月6日
The Tamako Railway, now the Seibu Tamako Line, opened.
Machine translation — show Japanese original
多摩湖鉄道（現在の西武多摩湖線）開業。
1928
10月15日
The Chuo Line was doubled-tracked between this station and Kokuritsu Station.
Machine translation — show Japanese original
中央線、当駅 - 国立駅間複線開通。
1929
3月5日
The Chuo Line was electrified between this station and Naito Station.
Machine translation — show Japanese original
中央線、当駅 - 国立駅間電化開通。
1931
6月16日
Kokubunji Locomotive Depot was abolished.
Machine translation — show Japanese original
国分寺機関分庫廃止。
1934
4月2日
Japanese National Railways opened the Chuo Main Line branch line, also known as the Shimokawara Line, limited to passenger transport only on horse racing days, with freight handling remaining within the station premises, and double-tracking as far as Fujimi temporary signal station, later known as Kita-Fuchu Station.
Machine translation — show Japanese original
国鉄、中央本線支線（下河原線）開業。競馬開催日に限り旅客輸送（貨物は当駅構内扱いのまま。富士見仮信号所〈後の北府中駅〉までは二重線籍）。
1940
3月12日
Tama Lake Railway merged with Musashino Railway.
Machine translation — show Japanese original
多摩湖鉄道が武蔵野鉄道に合併。
1944
10月1日
Japanese National Railways suspended passenger operations on the Shimokawara Line, and around this time, transportation of factory workers to the loading platform inside Fujimi Temporary Signal Station began, which was treated as being within the station premises.
Machine translation — show Japanese original
国鉄、下河原線の旅客営業を休止。この頃から富士見仮信号所内の乗降場への工場従業員輸送が始まる（当駅構内扱い）。
1944
11月21日
A spur line to Fuchu Prison was completed.
Machine translation — show Japanese original
府中刑務所に向けた引込線が完成。
1945
9月22日
Musashino Railway merged with the former Seibu Railway and was renamed Seibu Agricultural Railway, resulting in the current two Seibu lines coming under the same company.
Machine translation — show Japanese original
武蔵野鉄道が西武鉄道（旧）を合併。西武農業鉄道に改称。現在の西武2線が同一の会社所属となる。
1946
11月15日
Seibu Nogyo Railway was renamed Seibu Railway.
Machine translation — show Japanese original
西武農業鉄道が西武鉄道に改称。
1947
4月24日
Japanese National Railways resumed passenger operations on the Shimokawara Line.
Machine translation — show Japanese original
国鉄、下河原線の旅客営業を再開。
1949
6月1日
Japanese National Railways was established.
Machine translation — show Japanese original
日本国有鉄道発足。
1952
7月1日
Japanese National Railways began freight operations on the Shimokobashi Line, with passenger and freight operations on the section between this station and Kita-Fuchu Station.
Machine translation — show Japanese original
国鉄、下河原線貨物営業開始。当駅 - 北府中駅間は旅客・貨物営業とする。
1956
12月1日
The Japanese National Railways' south entrance station building was completed and opened for use.
Machine translation — show Japanese original
国鉄の南口駅舎が完成し、供用開始。
1973
4月1日
With the opening of the Musashino Line, Japanese National Railways abolished the section of the Shimogawara Line between this station, Kitafuchu Station, and Tokyo Keiba-jo-mae Station.
Machine translation — show Japanese original
国鉄、武蔵野線開通に伴い下河原線当駅 - 北府中駅 - 東京競馬場前駅間を廃止。
1976
9月20日
Cargo handling at Japanese National Railways stations was abolished.
Machine translation — show Japanese original
国鉄駅での貨物取り扱いを廃止。
1980
This was accompanied by a timetable revision, which made the station a stop for Special Rapid and Commuter Rapid services, while the newly established Ōme Special Rapid services passed through, and the station became a passing point for through trains instead of Musashi-Koganei Station.
Machine translation — show Japanese original
これに伴いダイヤ改正が実施され、特別快速（中央特快）と通勤快速が停車するようになる。改正で新設された青梅特快は通過。また、武蔵小金井駅に代わり通過列車の待避駅となる。
1984
2月1日
Japanese National Railways discontinued luggage handling at its stations.
Machine translation — show Japanese original
国鉄駅での荷物取り扱いを廃止。
1986
Work began on station improvement projects, including the expansion of the Japanese National Railways station to 2 platforms and 4 tracks, elevation to a bridge-style station building, and construction of a station building.
Machine translation — show Japanese original
駅改良工事（国鉄駅2面4線化、橋上駅舎化、駅ビル建設）着工。
1987
4月1日
With the privatization of Japanese National Railways, the station became a station of East Japan Railway Company (JR East).
Machine translation — show Japanese original
国鉄分割民営化に伴い、国鉄の駅は東日本旅客鉄道（JR東日本）の駅となる。
1988
12月1日
The JR station was expanded to 2 sides and 4 tracks, and the elevated station building was completed.
Machine translation — show Japanese original
JR駅の2面4線化工事、橋上駅舎完成。
1989
3月1日
In 1989, the station building (Marui, Kokubunji L), was completed.
Machine translation — show Japanese original
（平成元年）：駅ビル（丸井・国分寺エル）竣工。
1990
The Seibu Yamaguchi Line platform relocation work was completed at Tamako Station, but the correct translation should be: The platform relocation work on the Seibu Yamaguchi Line was completed.
Machine translation — show Japanese original
西武多摩湖線ホーム移設工事完了。
1992
7月30日
Automatic ticket gates were installed and began operation at JR stations.
Machine translation — show Japanese original
JR駅に自動改札機を設置し、使用開始。
1993
4月10日
With the JR East timetable revision, the station began serving Ome Special Rapid services, resulting in all Special Rapid trains stopping at the station, and Commuter Special Rapid services were also introduced, stopping at the station.
Machine translation — show Japanese original
JR東日本のダイヤ改正に伴い、青梅特快の停車を開始。これにより特別快速の全電車が当駅に停車。通勤特快運行開始、当駅に停車。
1994
6月15日
The section between Kokuritsu Station and Tachikawa Station was electrified, and electric train operation began between the two stations, resulting in steam trains from Iidabashi and Shinjuku passing through Kokubunji Station.
Machine translation — show Japanese original
国立駅 - 立川駅間が電化、両駅間で電車運転が開始。これに伴い飯田町、新宿発着の汽車（出典ママ）は国分寺駅を通過運転することとなった。
1998
8月30日
Crossovers were installed 200m towards Tokyo Station from the JR East platform, and were put into use from December of the same year.
Machine translation — show Japanese original
JR東日本のホームから東京駅寄りに200mの地点に両渡り線を設置。同年12月から使用開始。
2001
11月18日
IC card "Suica" becomes available for use on JR East.
Machine translation — show Japanese original
JR東日本でICカード「Suica」の利用が可能となる。
2002
3月23日
The operation of the limited express "Narita Express" train departing from Takao Station began, with one train bound for Narita Airport making a stop, and from December 1 of the same year, a train terminating at Takao Station also started operating, with one round trip making a stop.
Machine translation — show Japanese original
特急「成田エクスプレス」高尾駅始発列車の運行開始、成田空港行き1本が停車するようになる（同年12月1日に高尾駅終着列車も運行開始、上下1往復停車となる）。
2003
3月12日
With the Seibu Railway timetable revision, regular direct through services from this station to Shin-Tokorozawa Station on the Shinjuku Line via the Kokubunji Line began, later extended to Hon-Kawagoe Station on June 14, 2008.
Machine translation — show Japanese original
西武鉄道のダイヤ改正に伴い、国分寺線で当駅始発・新宿線新所沢駅までの定期直通運転を開始（2008年6月14日に本川越駅まで延長）。
2013
10月25日
The station building "Kokubunji El" was renamed to "Cereo Kokubunji".
Machine translation — show Japanese original
駅ビル「国分寺エル」が「セレオ国分寺」へ名称変更。
2016
4月21日
The station building "Cereo Kokubunji" underwent its first-phase renovation.
Machine translation — show Japanese original
駅ビル「セレオ国分寺」が第1期リニューアル。
2016
11月25日
The station building "Cereo Kokubunji" underwent its second-phase renovation.
Machine translation — show Japanese original
駅ビル「セレオ国分寺」が第2期リニューアル。
2017
3月4日
The departure melody at JR station platforms was changed to "Electric Train".
Machine translation — show Japanese original
JR駅ホームの発車メロディを「電車ごっこ」に変更。
2018
11月22日
The station building "Cereo Kokubunji" underwent its third-phase renovation.
Machine translation — show Japanese original
駅ビル「セレオ国分寺」が第3期リニューアル。
2019
5月12日
In Reiwa 1, Byuu Plaza's operations came to an end on this day.
Machine translation — show Japanese original
（令和元年）：この日をもってびゅうプラザの営業が終了。
2021
3月2日
The platform doors on the 5th platform of the Seibu Line (Kokubunji Line) began operation.
Machine translation — show Japanese original
西武線5番ホーム（国分寺線）のホームドア使用開始。
2021
3月12日
The platform doors on the Seibu Line's 7th platform, for the Tamako Line, began operation.
Machine translation — show Japanese original
西武線7番ホーム（多摩湖線）のホームドア使用開始。
2024
3月16日
With the timetable revision, the Narita Express through service on the Chuo Rapid Line was abolished, resulting in the disappearance of limited express trains stopping at this station.
Machine translation — show Japanese original
ダイヤ改正に伴い特急「成田エクスプレス」の中央快速線直通系統が廃止。これにより当駅に停車する特急列車が消滅した。
2026
JR East's platforms 2 and 3, the main line for the Chuo Line Rapid Service, are scheduled to start using sliding frame platform doors.
Machine translation — show Japanese original
度：JR東日本の2・3番線（中央線快速の主本線）ホームでスリットフレームホームドアの使用を開始（予定）。
Timeline adapted from Japanese Wikipedia, available under CC BY-SA 4.0.
Departure Melodies
電車ごっこ
作曲家・信時潔が国分寺市に在住していたことによる。
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PLATFORM LAYOUT (CHŪŌ LINE (RAPID))
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立川 · 八王子 · 高尾
3・4
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三鷹 · 新宿 · 東京
↕ Platforms 1, 2, 3, 4 serve this line
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What train lines connect at Kokubunji Station?
Kokubunji Station is served by Chūō Line (Rapid).