| Nagano 3rd district | |
| Type: | Parliamentary |
| Constituency Link: | Nagano 3rd district |
| Parl Name: | Japanese House of Representatives |
| Map Size: | 450px |
| District Label: | Prefecture |
| District: | Nagano |
| Region Label: | Proportional District |
| Region: | Hokurikushin'etsu |
| Electorate: | 400,529 (2020)[1] |
| Year: | 1994 |
| Members Label: | Representative |
| Members: | Yousei Ide |
| Seats: | One |
| Elects Howmany: | One |
| Party Label: | Party |
| Party: | Liberal Democratic |
| Previous: | Nagano 2nd district (1947–1993) |
| Blank1 Name: | Municipalities |
| Blank1 Info: | Ueda, Komoro, Chikuma, Saku, Tōmi, Minamisaku, Kitasaku, Chiisagata and Hanishina |
Nagano 3rd district (長野県第3区, Nagano-ken dai-sanku or 長野3区, Nagano sanku) is a single-member constituency of the House of Representatives, the lower house of the national Diet of Japan. It is located in central and eastern part of Nagano Prefecture and consists of Ueda City, Komoro City, Chikuma City, Saku City, Tōmi City, Minamisaku District, Kitasaku District, Chiisagata District and Hanishina District. As of December 2020, 400,529 eligible voters were registered in the district.
Yousei Ide, a Liberal Democrat, has represented this district since December 2014.
| Member | Party | Dates | Electoral history | Notes | ||
|---|---|---|---|---|---|---|
Tsutomu Hata | bgcolor=#FFE6FB | New Frontier | nowrap | October 21, 1996 – December 26, 1996 | Redistricted from the former 2nd district and Re-elected in 1996. Re-elected in 2000. Re-elected in 2003. Re-elected in 2005. Re-elected in 2009. Retired. | Prime Minister of Japan (1994) |
| bgcolor=#FFF2E6 | Sun | nowrap | December 26, 1996 – January 23, 1998 | |||
| bgcolor=#E6FFFB | Good Governance | nowrap | January 23, 1998 – April 27, 1998 | |||
| Democratic | nowrap | April 27, 1998 – November 16, 2012 | ||||
| align=left | Yoshiyuki Terashima | Democratic | nowrap | December 17, 2012 – November 21, 2014 | Elected in 2012. Lost re-election. | Lost re-election in the Hokurikushin'etsu PR block. |
| Yousei Ide | bgcolor=#5EB1B5 | Innovation | nowrap | December 15, 2014 – March 27, 2016 | Re-elected in 2014. Re-elected in 2017. | Elected in 2012 by the Hokurikushin'etsu PR block. |
| bgcolor=#707FC4 | Democratic | nowrap | March 27, 2016 – October 3, 2017 | |||
| bgcolor=#63A27F | Kibō | nowrap | October 3, 2017 – May 7, 2018 | |||
| Independent | nowrap | May 7, 2018 – December 21, 2019 | ||||
| Liberal Democratic | nowrap | December 21, 2019 – present |
| align=center |