| Election Name: | September 2010 Democratic Party (Japan, 1998) leadership election |
| Flag Image: | Democratic Party of Japan Logo.svg |
| Type: | primary |
| Vote Type: | Caucus |
| Ongoing: | no |
| Previous Election: | June 2010 Democratic Party (Japan, 1998) leadership election |
| Previous Year: | 2010 |
| Next Election: | 2011 Democratic Party (Japan, 1998) leadership election |
| Next Year: | 2011 |
| Election Date: | 14 September 2010 |
| 3Blank: | Points |
| 4Blank: | Caucus |
| Candidate1: | Naoto Kan |
| Color1: | EA1B2D |
| 3Data1: | 721 |
| 4Data1: | 206 |
| Candidate2: | Ichirō Ozawa |
| Color2: | EA1B2D |
| 3Data2: | 491 |
| 4Data2: | 200 |
| President | |
| Before Election: | Naoto Kan |
| After Election: | Naoto Kan |
The September 2010 Democratic Party of Japan leadership election was held on 14 September 2010 after the incumbent party President Naoto Kan who served the remain of Yukio Hatoyama's term came to an end at the same time Kan bets for his election. On August 26, 2010 the "Shadow Shōgun" Ichirō Ozawa declared his candidacy to challenge Kan for leadership and premiership.[1]
| Candidates | Members of Parliament | Local assembly members | party members & supporters | total | |
|---|---|---|---|---|---|
| Naoto Kan | 412 points (206 votes) | 60 points (proportional) | 249 points (majority in 249 districts) | 721 points | |
| Ichirō Ozawa | 400 points (200 votes) | 40 points (proportional) | 51 points (majority in 51 districts) | 491 points | |
| Grand Total | 812 points (3 invalid votes) | 100 points (2.382 assembly members) | 300 points (342.493 eligible voters in 300 districts) | 1212 points |
| Candidates | Votes | |
|---|---|---|
| Naoto Kan | 206 | |
| Ichirō Ozawa | 200 | |
| Grand Total | 411 |