| Chiba 1st District | |
| Type: | Parliamentary |
| Constituency Link: | Chiba 1st district |
| Parl Name: | Japanese House of Representatives |
| District Label: | Prefecture |
| District: | Chiba |
| Region Label: | Proportional District |
| Region: | Southern Kanto |
| Electorate: | 433,793[1] |
| Year: | 1994 |
| Members Label: | Representative |
| Members: | Kaname Tajima |
| Seats: | One |
| Elects Howmany: | One |
| Party Label: | Party |
| Party: | CDP |
| Previous: | Chiba 1st "medium-sized" district |
| Blank1 Name: | Municipalities |
| Blank1 Info: | Chiba (Chūōku, Inage-ku, and Mihama-ku) |
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.
| Election | Representative | Party | Dates | Notes | |||
|---|---|---|---|---|---|---|---|
| 1996 | Hideo Usui | LDP | 1996 – 2003 | ||||
| 2000 | |||||||
| 2003 | Kaname Tajima | bgcolor= | DPJ | 2003 – 2005 | |||
| 2005 | Hideo Usui | bgcolor= | LDP | 2005 – 2009 | |||
| 2009 | Kaname Tajima | DPJ | 2009 – 2016 | ||||
| 2012 | |||||||
| 2014 | |||||||
| bgcolor= | DP | 2016-2017 | |||||
| bgcolor= | Kibō | 2017 | |||||
| 2017 | Hiroaki Kadoyama | bgcolor= | LDP | 2017 – 2021 | |||
| 2021 | Kaname Tajima | bgcolor= | CDP | 2021–present | |||