# Iwate 1st district

Iwate 1st district (岩手[県第]1区, Iwate[-ken dai-]ikku) is a single-member constituency of the House of Representatives in the Diet of Japan. It is located in central Iwate and consists of the prefectural capital Morioka city and the two remaining towns in Shiwa district. Before 2017, it covered of the majority of the prefectural capital Morioka (the whole city without the former village of Tamayama) and Shiwa district. In 2012, 278,860 eligible voters were registered in the district.
Before the electoral reform of 1994, the area had been part of the multi-member Iwate 1st district that elected four Representatives by single non-transferable vote.
Iwate is the home of Ichirō Ozawa and like three of the prefecture's four post-reform districts, the 1st district had been represented by his parties from its creation to 2012: the New Frontier Party, the Liberal Party and the Democratic Party. In 2012, Ozawa and his followers split from the Democratic Party: 1st district representative Shina stayed with the Democrats, Ozawa's Tomorrow Party of Japan nominated Yōko Tasso, the wife of former representative and current Iwate governor Takuya Tasso; but Shina defended the district against Tasso and Liberal Democratic former prefectural assembly member Hinako Takahashi who won a proportional block seat.

## List of representatives

| Representative | Party | Dates | Notes |
| Takuya Tasso | NFP | 1996–2000 | |
| Takuya Tasso | LP | 2000–2003 | |
| Takuya Tasso | DPJ | 2003–2007 | Resigned. Elected Governor of Iwate Prefecture in 2007 |
| Takeshi Shina | DPJ | 2007–2016 | |
| Takeshi Shina | DP | 2016–2017 | |
| Takeshi Shina | Kibō no Tō | 2017–2018 | |
| Takeshi Shina | DPP | 2018–2020 | |
| Takeshi Shina | CDP | 2020– | |

## Election results

* DC: Dual candidate (jūfuku rikkōho) standing simultaneously for a seat in the Tōhoku proportional representation block
* $: Lost deposit and if a dual candidate: is also ineligible as a proportional candidate
2024 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Takeshi Shina | 94,409 | 61.5 | 10.3 |
| | LDP | Hiromasa Yonai | 43,623 | 28.4 | 8.4 |
| | JCP | Kyōko Yoshida | 15,367 | 10.0 | 1.9 |
| Registered electors | Registered electors | Registered electors | 287,457 | | |
| Turnout | Turnout | Turnout | | 54.37 | 4.44 |
| | CDP hold | CDP hold | CDP hold | CDP hold | CDP hold |
2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Takeshi Shina | 87,017 | 51.2 | 1.4 |
| | LDP | Hinako Takahashi | 62,666 | 36.9 | 2.4 |
| | JCP | Kyōko Yoshida | 20,300 | 11.9 | 1.0 |
| Registered electors | Registered electors | Registered electors | 293,290 | | |
| Turnout | Turnout | Turnout | | 58.81 | 1.79 |
| | CDP hold | CDP hold | CDP hold | CDP hold | CDP hold |
2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | Kibō no Tō | Takeshi Shina | 87,534 | 52.6 | |
| | LDP | Hinako Takahashi (elected in Tohoku PR block) | 57,381 | 34.5 | 3.1 |
| | JCP | Kyōko Yoshida | 21,549 | 12.9 | 2.5 |
| Registered electors | Registered electors | Registered electors | 296,551 | | |
| Turnout | Turnout | Turnout | | 57.02 | 3.52 |
2014 :
| Party | Candidate | Votes | % | ±% |
| Democratic | Takeshi Shina (DC) | 76,787 | 52.0 | +17.3 |
| LDP | Hinako Takahashi (DC, won PR seat) | 46,409 | 31.4 | +4.1 |
| JCP | Kyōko Yoshida | 15,374 | 10.4 | new |
| Social Democratic | Mitsumasa Hosokawa (DC, $) | 9,052 | 6.1 | new |
2012 :
| Party | Candidate | Votes | % |
| Democratic | Takeshi Shina (endorsed by PNP, DC) | 55,909 | 34.7 |
| LDP | Hinako Takahashi (DC, elected by PR) | 44,002 | 27.3 |
| Tomorrow | Yōko Tasso (endorsed by NPD, DC) | 41,706 | 25.9 |
| Social Democratic | Masahiro Isawa (DC, $) | 9,922 | 6.2 |
| JCP | Shino Yahata ($) | 9,473 | 5.9 |
2009 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Takeshi Shina (endorsed by PNP) | 116,425 | 60.2 |
| | LDP | Hinako Takahashi (endorsed by Komeito) | 50,585 | 26.2 |
| | Social Democratic | Masahiro Isawa | 13,048 | 6.8 |
| | JCP | Kyōko Yoshida | 12,187 | 6.3 |
| | Happiness Realization | Kensaku Mori | 1,047 | 0.5 |
| Turnout | Turnout | Turnout | 195,474 | 70.93 |
By-election, July 29, 2007 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Takeshi Shina (endorsed by PNP) | 102,987 | 61.7 |
| | LDP | Masanori Tamazawa (endorsed by Komeito) | 53,125 | 31.8 |
| | JCP | Sadakiyo Segawa | 10,821 | 6.5 |
| Turnout | Turnout | Turnout | 169,092 | 61.05 |
2005 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Takuya Tasso | 95,109 | 51.7 |
| | LDP | Atsushi Oikawa | 65,187 | 35.4 |
| | Social Democratic | Mitsumasa Hosokawa | 14,050 | 7.6 |
| | JCP | Shin'ya Kanbe | 9,659 | 5.2 |
| Turnout | Turnout | Turnout | 185,845 | 67.93 |
2003 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Takuya Tasso | 91,025 | 53.6 |
| | LDP | Atsushi Oikawa | 57,899 | 34.1 |
| | Social Democratic | Yuriko Gotō | 12,014 | 7.1 |
| | JCP | Yōichi Naganuma | 8,806 | 5.2 |
| Turnout | Turnout | Turnout | 171,880 | 63.34 |
2000 :
| Party | Candidate | Votes | % |
| Liberal | Takuya Tasso | 97,835 | 43.0 |
| LDP | Tokuichirō Tamazawa | 65,597 | 37.7 |
| Social Democratic | Yuriko Gotō | 17,309 | 9.9 |
| JCP | Ryūgorō Satō | 9,261 | 5.3 |
| Democratic | Kikuji Fujikura | 6,964 | 4.0 |
1996 :
| Party | Party | Candidate | Votes | % |
| | New Frontier | Takuya Tasso | 67,420 | 40.6 |
| | LDP | Tokuichirō Tamazawa (elected by PR) | 49,665 | 29.9 |
| | Independent | Riki Nakamura | 17,087 | 10.3 |
| | Social Democratic | Kuniki Yamanaka | 16,758 | 10.1 |
| | JCP | Toshiko Sakuma | 10,668 | 6.4 |
| | Democratic | Yuriko Gotō | 4,551 | 2.7 |
| Turnout | Turnout | Turnout | 168,434 | 65.63 |