| Election Name: | September 2017 Democratic Party leadership election |
| Country: | Japan |
| Type: | presidential |
| Vote Type: | Caucus |
| Ongoing: | no |
| Previous Election: | 2016 Democratic Party (Japan) leadership election |
| Previous Year: | 2016 |
| Next Election: | October 2017 Democratic Party (Japan, 2016) leadership election |
| Next Year: | Oct 2017 |
| Election Date: | 1 September 2017 |
| 1Blank: | Points |
| 2Blank: | Caucus |
| Candidate1: | Seiji Maehara |
| Colour1: | 004098 |
| 1Data1: | 502 (60.19%) |
| 2Data1: | 83 (166pts) |
| Candidate2: | Yukio Edano |
| Colour2: | 004098 |
| 1Data2: | 332 |
| 2Data2: | 51 |
| President | |
| Before Election: | Renho |
| After Election: | Seiji Maehara |
The September 2017 Democratic Party held a presidential election on 1 September 2017 to choose a replacement for the previous president Renho, who resigned on 27 July 2017.[1]
Seiji Maehara was elected as the new president.
Voting was held on 1 September, following a campaign period from 21 August.
| Total points | Caucus | Endorsed candidates | Local councillors | Party members & supporters | ||
| Seiji Maehara | 502pts (60.19%) | 83 (166pts) | 84 (84pts) | 724 (115pts) | 51,692 (137pts) | |
|---|---|---|---|---|---|---|
| 332pts (39.81%) | 51 (102pts) | 42 (42pts) | 590 (94pts) | 38,409 (94pts) | ||
| Invalid votes | - | 8 | 0 | 5 | 1,084 | |
| Total | 834pts (100%) | 142 (268pts) | 126 (126pts) | 1,319 (209pts) | 91,185 (231pts) |