| Hokkaido 8th District | |
| Type: | Parliamentary |
| Constituency Link: | Hokkaidō 8th district |
| Parl Name: | Japanese House of Representatives |
| District Label: | Prefecture |
| District: | Hokkaido |
| Region Label: | Proportional District |
| Region: | Hokkaido |
| Electorate: | 361,180 (2021)[1] |
| Year: | 1996 |
| Members Label: | Representative |
| Members: | Seiji Osaka |
| Seats: | One |
| Elects Howmany: | One |
| Party Label: | Party |
| Party: | Constitutional Democratic |
| Blank1 Name: | Subprefecture |
| Blank1 Info: | Oshima and Hiyama |
is a single-member electoral district for the House of Representatives, the lower house of the National Diet of Japan. It is located in the prefecture of Hokkaidō and consists of Hokkaido's Hiyama and Oshima subprefectures.
From 1947 the district was known as the Hokkaido 3rd district and elected three members to the House. Under the 1994 reforms that came into effect at the 1996 general election, the district's boundaries were not changed but it was renamed to the 8th district and had its representation reduced to one. This reduction was offset by the introduction of the multi-member Hokkaido proportional representation block that elects eight members to represent the entire prefecture.
| Representative | Party | Dates | Notes | ||
|---|---|---|---|---|---|
| Yoshio Hachiro | bgcolor= | DPJ | 1996 – 2003 | Switched to the Hokkaido 4th district. | |
| Seiichi Kaneta | bgcolor= | DPJ | 2003 – 2009 | ||
| Seiji Osaka | bgcolor= | DPJ | 2009 – 2012 | ||
| Kazuo Maeda | bgcolor= | LDP | 2012 – 2014 | won a proportional seat in the Hokkaidō block in 2014 | |
| Seiji Osaka | bgcolor= | DPJ | 2014 – 2017 | ||
| bgcolor= | CDP | 2017 – | |||