| Election Name: | 2016 Democratic Party leadership election |
| Country: | Japan |
| Type: | presidential |
| Vote Type: | Caucus |
| Ongoing: | no |
| Previous Election: | 2015 Democratic Party (Japan) leadership election |
| Previous Year: | 2015 |
| Next Election: | September 2017 Democratic Party (Japan, 2016) leadership election |
| Next Year: | Sep 2017 |
| Election Date: | 15 September 2016 |
| 1Blank: | Points |
| 2Blank: | Caucus |
| Candidate1: | Renho |
| Colour1: | 004098 |
| 1Data1: | 503 (59.25%) |
| 2Data1: | 80 (160pts) |
| Candidate2: | Seiji Maehara |
| Colour2: | 004098 |
| 1Data2: | 230 (27.09%) |
| 2Data2: | 42 (84pts) |
| Candidate3: | Yuichiro Tamaki |
| Colour3: | 004098 |
| 1Data3: | 116 (13.66%) |
| 2Data3: | 25 (50pts) |
| President | |
| Before Election: | Katsuya Okada |
| After Election: | Renho |
The 2016 Democratic Party leadership election was held on 15 September 2016. It was the party's first election since the formation of the party from the merger of the Democratic Party of Japan and the Japan Innovation Party. The race determined the successor of acting president Katsuya Okada who decided against running for a full term.[1]
Voting was held on 15 September, following a campaign period from 2 September.
| Total points | Caucus | Endorsed candidates | Local councillors | Party members & supporters | ||
| Renhō | 503pts (59.25%) | 80 (160pts) | 50 (50pts) | 847 (126pts) | 59,539 (167pts) | |
|---|---|---|---|---|---|---|
| Seiji Maehara | 230pts (27.09%) | 42 (84pts) | 44 (44pts) | 335 (50pts) | 26,045 (52pts) | |
| Yūichiro Tamaki | 116pts (13.66%) | 25 (50pts) | 24 (24pts) | 207 (30pts) | 9,808 (12pts) | |
| Invalid votes | - | 0 | 0 | 4 | 789 | |
| Total | 849pts (100%) | 147 (294pts) | 118 (118pts) | 1,393 (206pts) | 96,181 (231pts) |