# Chiba 1st district

Chiba 1st district (千葉県第1区, Chiba-ken dai-ikku or simply 千葉1区, Chiba-ikku) is a single-member constituency of the House of Representatives in the national Diet of Japan located in the city of Chiba, Chiba Prefecture.

## List of representatives

| Election | Representative | Party | Dates |
| 1996 | Hideo Usui | LDP | 1996 – 2003 |
| 2000 | Hideo Usui | LDP | 1996 – 2003 |
| 2003 | Kaname Tajima | DPJ | 2003 – 2005 |
| 2005 | Hideo Usui | LDP | 2005 – 2009 |
| 2009 | Kaname Tajima | DPJ | 2009 – 2016 |
| 2012 | Kaname Tajima | DPJ | 2009 – 2016 |
| 2014 | Kaname Tajima | DPJ | 2009 – 2016 |
| 2014 | Kaname Tajima | DP | 2016-2017 |
| 2014 | Kaname Tajima | Kibō | 2017 |
| 2017 | Hiroaki Kadoyama<ja> | LDP | 2017 – 2021 |
| 2021 | Kaname Tajima | CDP | 2021–present |

## Election Results

2021 :
| Party | Party | Candidate | Votes | % | ±% |
| | CDP | Kaname Tajima (Incumbent-PR) | 128,556 | 56.27 | New |
| | LDP | Hiroaki Kadoyama<ja> (Incumbent) (elected by PR) | 99,895 | 43.73 | 3.04 |
| Registered electors | Registered electors | Registered electors | 430,513 | | |
| Turnout | Turnout | Turnout | 228,451 | 54.51 | 4.82 |
2017 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Hiroaki Kadoyama (Incumbent-PR) | 82,838 | 40.69 | 3.38 |
| | Kibō | Kaname Tajima (Incumbent) (elected by PR) | 81,481 | 40.03 | New |
| | JCP | Takashi Ohno | 24,231 | 11.90 | 3.08 |
| | Ishin | Yutaka Hasegawa<ja> | 15,014 | 7.38 | New |
| Registered electors | Registered electors | Registered electors | 419,847 | | |
| Turnout | Turnout | Turnout | 203,564 | 49.69 | 2.72 |
2014 :
| Party | Party | Candidate | Votes | % | ±% |
| | DPJ | Kaname Tajima (Incumbent) | 84,755 | 41.10 | 7.90 |
| | LDP | Hiroaki Kadoyama (Incumbent-PR) (reelected by PR) | 76,937 | 37.31 | 7.13 |
| | PFG | Takashi Tanuma<ja> | 26,322 | 12.77 | New |
| | JCP | Tadayoshi Yoshida | 18,182 | 8.82 | 3.17 |
| Registered electors | Registered electors | Registered electors | 404,904 | | |
| Turnout | Turnout | Turnout | 206,196 | 52.41 | 6.80 |
2012 :
| Party | Party | Candidate | Votes | % | ±% |
| | DPJ | Kaname Tajima (Incumbent) | 76,914 | 33.20 | 23.49 |
| | LDP | Hiroaki Kadoyama (elected by PR) | 69,927 | 30.18 | 7.49 |
| | JRP | Takashi Tanuma (elected by PR) | 44,668 | 19.28 | New |
| | YP | Motoki Nishino | 27,089 | 11.69 | New |
| | JCP | Ken Terao | 13,102 | 5.65 | 0.67 |
| Registered electors | Registered electors | Registered electors | 402,425 | | |
| Turnout | Turnout | Turnout | 231,700 | 59.21 | 5.12 |
2009 :
| Party | Party | Candidate | Votes | % | ±% |
| | DPJ | Kaname Tajima (Incumbent-PR) | 142,694 | 56.69 | 13.33 |
| | LDP | Shoichi Usui | 94,820 | 37.67 | 13.44 |
| | JCP | Takeo Agui | 12,540 | 4.98 | 0.55 |
| | HRP | Kazuyoshi Shina | 1,644 | 0.65 | New |
| Registered electors | Registered electors | Registered electors | 397,382 | | |
| Turnout | Turnout | Turnout | 251,698 | 64.33 | 0.56 |
2005 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Hideo Usui | 124,292 | 51.11 | 7.25 |
| | DPJ | Kaname Tajima (Incumbent) (elected by PR) | 105,459 | 43.36 | 5.85 |
| | JCP | Tomoki Sasaki | 13,443 | 5.53 | 1.39 |
| Registered electors | Registered electors | Registered electors | 380,707 | | |
| Turnout | Turnout | Turnout | 243,194 | 64.89 | 8.46 |
2003 :
| Party | Party | Candidate | Votes | % | ±% |
| | DPJ | Kaname Tajima | 100,838 | 49.21 | 16.30 |
| | LDP | Hideo Usui (Incumbent) | 89,873 | 43.86 | 0.94 |
| | JCP | Takeo Agui | 14,183 | 6.92 | 9.19 |
| Registered electors | Registered electors | Registered electors | 373,444 | | |
| Turnout | Turnout | Turnout | 204,894 | 56.43 | 1.88 |
2000 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Hideo Usui (Incumbent) | 90,358 | 44.80 | 2.09 |
| | DPJ | Tetsuo Kitamura<ja> (Incumbent-PR) | 66,378 | 32.91 | New |
| | JCP | Reiko Koshiba | 32,492 | 16.11 | 2.03 |
| | LL | Miyuki Kimura | 12,470 | 6.18 | 5.05 |
| Registered electors | Registered electors | Registered electors | 358,426 | | |
| Turnout | Turnout | Turnout | | 58.31 | |
1996 :
| Party | Party | Candidate | Votes | % | ±% |
| | LDP | Hideo Usui | 77,679 | 42.71 | New |
| | NFP | Minoru Murai | 40,094 | 22.04 | New |
| | DPJ | Naoko Kida | 31,226 | 17.17 | New |
| | JCP | Hiroshi Nomura | 25,612 | 14.08 | New |
| | NSP | Katsuo Hanzawa | 5,206 | 2.86 | New |
| | LL | Hideyasu Murata | 2,059 | 1.13 | New |
| Turnout | Turnout | Turnout | | | |