Last updated: January 29, 2021
| AD | Japanese Calendar | Main events |
|---|---|---|
| 1889 | Meiji 22 | Yanoguchi village, Higashi Naganuma village, Daimaru village, Hyaku village, Sakahama village, and Hirao village merged to form Inagi village (population 3,750). |
| 1897 | Meiji 30 | Village office construction |
| 1919 | 1919 | Electric lights light up in Inagi village |
| 1929 | 1929 | Nambu Railway (currently JR Nambu Line) opened all lines between Kawasaki and Tachikawa |
| 1935 | 1935 | Opening of Tamagawara Bridge |
| 1939 | Showa 14 | Pyrotechnic Factory Tama Explosives Factory (currently U.S. Army Tama Service Auxiliary Facility) opened. |
| 1946 | 1946 | Establishment of a hospital directly managed by Inagi Village National Health Insurance |
| 1949 | 1949 | Part of Oshidate and Tsunehisa was incorporated into Inagi Village from Tama Village, Kitatama County (currently Fuchu City). |
| 1953 | 1953 | Opened Inagi Hospital Sakahama Clinic |
| 1957 | 1957 | Town organization enacted (population 10,145, 1,940 households) |
| 1960 | 1960 | Simple water supply business started |
| 1964 | 1964 | Tamagawa Sanitation Association (garbage disposal) established |
| 1965 | 1965 | Water supply project construction started, Tama New Town project city planning decided |
| 1966 | 1966 | Double-tracking of Nambu Line |
| 1967 | 1967 | Establishment of town emblem (currently city emblem) |
| 1970 | 1970 | Inagi Fire Station established (19 employees, 1 pump truck, 1 ambulance), moved into Hirao housing complex Inagi Town Hall Hirao Branch Office opened |
| 1971 | 1971 | Municipal Inagi Central Hospital newly built, Tama New Town Inagi district business approved |
| 1973 | 1973 | Opening of the Central Culture Center Establishment of city tree (Ginkgo) and city flower (Pear) |
| 1974 | 1974 | Keio Sagamihara Line opens to Tama Center (Opens Inagi Station and Wakabadai Station) Inagi City water supply and sewerage are integrated into Tokyo, public relations radio broadcasting starts |
| 1975 | 1975 | Inagi City Long-Term Comprehensive Plan/Basic Concept Formulated Second Cultural Center Opened, Kita Ryokuchi Park Opened |
| 1976 | 1976 | Formulation of long-term comprehensive plan and first-term basic plan |
| 1979 | 1979 | Third Cultural Center opened |
| 1981 | 1981 | 10th anniversary of municipal organization enactment, enactment of civic charter, completion of city hall, construction of burying public sewage and sewage pipes begins |
| 1982 | 1982 | Welfare center opened |
| 1983 | 1983 | Fourth Cultural Center opened |
| 1984 | 1984 | Formulation of long-term comprehensive plan and late basic plan Inagi Citizen Charter Promotion Council launched |
| 1985 | 1985 | Service start of the sewer |
| 1986 | 1986 | Computerization of resident registration work, operation of resident information system |
| 1987 | 1987 | Completion of Daimaru Water Park |
| 1988 | 1988 | Move-in begins in Tama New Town Koyodai area |
| 1989 | 1989 | Celebrating the 100th anniversary of the birth of Inagi Village |
| 1990 | 1990 | Formulation of the second long-term comprehensive plan and basic concept Implementation of the project to rearrange town names and numbers in the Hirao district |
| 1991 | 1991 | 20th anniversary of municipal organization Enforcement of Inagi City Peace City Declaration Resolution, sister city tie-up with Memanbetsu Town, Hokkaido Inagi Central Park general ground and baseball field opened 2nd long-term comprehensive plan / basic plan formulated |
| 1992 | 1992 | General gymnasium opened, Inagi Green Wellness Foundation established Shiroyama Cultural Center opened |
| 1993 | 1993 | Yanoguchi Station, Inagi Naganuma Station, Minamitama Station area readjustment business approval |
| 1995 | 1995 | Inagi Ohashi toll road opens, Tama New Town Nagamine area begins moving in. Koyodai area wins Cityscape Grand Prix Minister of Construction Award and is selected as one of the 100 best urban landscapes. |
| 1997 | 1997 | Opened health center JR Nambu Line continuous grade separation project started |
| 1998 | 1998 | Tamagawa Hygiene Association new factory completed New ward of municipal hospital opened and operations commenced |
| 1999 | 1999 | Started moving into Tama New Town Wakabadai area Opened Inagi City Hall Wakabadai branch office Opened second school lunch kitchen |
| the year of 2000 | 2000 | Formulation of the 3rd Long-Term Comprehensive Plan and Basic Concept Enactment of the "Citizen Ordinance to Clean Up the Town" |
| 2001 | 2001 | 30th anniversary of municipal organization 3rd long-term comprehensive plan/basic plan formulated Completion of hot water system using residual heat between Clean Center Tamagawa and municipal hospital Verdy Kawasaki moved to Tokyo, based in Inagi |
| 2002 | 2002 | Inagi city circulation bus "i-bus" started operation 1st I-no-Machi Inagi Citizen Festival held |
| 2003 | 2003 | Opened Hatsuratsu Work Inagi |
| 2004 | 2004 | Opened Friend Hirao (former Daihachi Elementary School) |
| Year 2005 | 2005 | Opening of Regional Promotion Plaza Completed the first phase construction of the JR Nambu Line continuous grade separation project |
| 2006 | 2006 | Opened Central Library and Shiroyama Experience Learning Center Opened Kamiyato Ryokuchi Experience Learning Center Opened sister city tie-up with Ozora Town, Hokkaido |
| 2007 | 2007 | Opening of the Minamitama Ridge Trunk Line Start of Nursing Care Support Volunteer System Received the Minister of Internal Affairs and Communications Commendation (Group Commendation) Commemorating the 60th Anniversary of the Enforcement of the Local Autonomy Law |
| 2008 | 2008 | Libraries in 7 cities along the Keio Line started to use each other |
| 2009 | 2009 | Complex facility i Plaza opened |
| 2010 | 2010 | Formulation of the Fourth Long-Term Comprehensive Plan and Basic Concept Making Inagi Ohashi Bridge Free |
| 2011 | 2011 | 40th anniversary of municipal organization 4th long-term comprehensive plan and basic plan formulated Inagi city mascot character "Nashinosuke Inagi" is born |
| year 2012 | 2012 | Health plaza opened, Municipal hospital medical checkup, Outpatient building opened |
| 2013 | 2013 | Development Support Center "Respo Inagi" and Education Center opened (Frendo Hirao complex) Nanbu Line elevated changeover completed |
| 2014 | 2014 | i-Bus Phase 1 review route operation commenced |
| 2015 | 2015 | Opened Inagi Nagamine Sports Plaza Established friendship city partnership with Soma City, Fukushima Prefecture and Nozawa Onsen Village, Nagano Prefecture Opened public Inagi Fuchu Memorial Park and Nanzan Hall |
| 2016 | 2016 | Inagi transmission base pair terrace opened City bird (Kestrel) enacted "Inagi Free Wi-Fi" operation started Kamhirao Tunnel opened for the first time in Inagi City |
| 2017 | 2017 | Opened Kamhirao Fire Station Inagi City logotype "Inagi City" and "INAGI CITY" established. |
| 2018 | 2018 | Establishment of Inagi City Tourism Association 70th anniversary of the fire brigade, 50th anniversary of the firefighting headquarters |
| 2019 | 2019 | Birth of Hirao 4-chome |
| 2020 | Reiwa 2 | Completed construction of the new No. 1 school lunch joint kitchen Scope dog monument installed |
Inagi City Planning Department Planning Policy Division Phone: 042-378-2111