Candidates
大西 健介 — Aichi 13th District 2026
Updated 25 Tháng 5, 2026
- chevron_rightOutcome: Lost in Aichi 13th District (2026) — 94,399 votes (36.4%), rank #2 of 3.
- chevron_rightProfile: Male, age 54. Background: 政党役職. Status entering: Incumbent.
- chevron_rightCareer wins to date: 6
fact_check Quick Facts
Age
54 yrs
Gender
male ♂ Male
Election Date
Th10 22, 2026
System
Single-member
Seats Recorded
—
Election Performance
Vote Count & Share
Votes
94,399
Vote Share
36.4%
Rank
#2
Outcome
Lost
Win/Loss Outcome
Outcome
Did not win seat in 2026
Political Context
Party Affiliation
Centrist
中道
Party Candidates 2026
244
Party Seats Won
49
Prefectures
58
Avg Share
30.3%
Occupation & Background
Category政党役職
Detail元立憲民主党選挙対策委員長
Incumbency & Career Wins
- Status entering the 2026 election: Incumbent
- Total recorded wins to date: 6
- Age at time of election: 54
Comparative Snapshot
Same District Rivals
| Rank | Candidate | Party | Votes | Share |
|---|---|---|---|---|
| #1 | 石井 拓 | LDP | 151,944 | 58.6% |
| #2 | 大西 健介 this page | Centrist | 94,399 | 36.4% |
| #3 | 牛田 清博 | JCP | 12,910 | 5.0% |
Same-Party Peers in 2026
- 玄葉 光一郎 — Fukushima 2nd District, 36.4% (Lost)
- 大塚 小百合 — Kanagawa 20th District, 36.3% (Lost)
- 三角 創太 — Saitama 16th District, 36.5% (Lost)
- 安住 淳 — Miyagi 4th District, 36.2% (Lost)
- 長妻 昭 — Tokyo 27th District, 36.2% (Lost)
Candidates with Similar Vote Share
- 大串 正樹 (LDP, Hyogo 6th District) — 36.4%
- 田中 健 (DPP, Shizuoka 4th District) — 36.4%
- 玄葉 光一郎 (Centrist, Fukushima 2nd District) — 36.4%
- 英利 アルフィヤ (LDP, Chiba 5th District) — 36.5%
- 大塚 小百合 (Centrist, Kanagawa 20th District) — 36.3%
Career Timeline
Elections
3
Career Wins
2
Total Votes
366,376
Best Vote Share
56.3%
| Year | District | Party | System | Votes | Share | Rank | Result |
|---|---|---|---|---|---|---|---|
| 2026 | Aichi 13th District | Centrist | Single-member | 94,399 | 36.4% | #2 | Lost |
| 2024 | Aichi 13th District | CDP | Single-member | 137,944 | 56.3% | #1 | Won |
| 2021 | Aichi 13th District | CDP | Single-member | 134,033 | 52.7% | #1 | Won |
Aichi 13th District Historical Context
| Year | Winner | Party | Winning Votes | Winning Share | Field Size | Margin |
|---|---|---|---|---|---|---|
| 2026 | 石井 拓 | LDP | 151,944 | 58.6% | 3 | 57,545 |
| 2024 | 大西 健介 | CDP | 137,944 | 56.3% | 3 | 47,730 |
| 2021 | 大西 健介 | CDP | 134,033 | 52.7% | 2 | 13,830 |
Aichi Snapshot (2026)
Districts
16
Candidates
68
Seats Filled
16
Active Parties
11
Party representation across Aichi
LDP16 cand · 12 won
Centrist13 cand · 0 won
Sanseito9 cand · 0 won
減ゆ8 cand · 1 won
JCP8 cand · 0 won
DPP5 cand · 3 won
Ishin5 cand · 0 won
保守1 cand · 0 won
Reiwa1 cand · 0 won
Independent1 cand · 0 won
SDP1 cand · 0 won
Top performers across Aichi (2026)
| Candidate | District | Party | Votes | Share | Result |
|---|---|---|---|---|---|
| 石井 拓 | Aichi 13th District | LDP | 151,944 | 58.6% | Won |
| 丹野 みどり | Aichi 11th District | DPP | 145,739 | 59.7% | Won |
| 伊藤 忠彦 | Aichi 8th District | LDP | 131,050 | 52.8% | Won |
| 青山 周平 | Aichi 12th District | LDP | 128,453 | 47.0% | Won |
| 今枝 宗一郎 | Aichi 14th District | LDP | 119,376 | 67.4% | Won |
| 古川 元久 | Aichi 2nd District | DPP | 110,540 | 49.1% | Won |
| 丹羽 秀樹 | Aichi 6th District | LDP | 109,044 | 54.1% | Won |
Where 大西 健介 ranks
Among Centrist single-member candidates in 2026
Higher vote share than 72.3% (146 of 202)
Among ALL single-member candidates in 2026
Higher vote share than 68.7% (769 of 1119)
政党役職 cohort (2026)
Cohort Size
131
Cohort Wins
34
Cohort Avg Share
28.8%
Cohort Avg Age
57
大西 健介's 36.4% vote share is 7.56 percentage points above the 政党役職 cohort average for 2026.
Frequently Asked Questions
How many times has 大西 健介 run for the House of Representatives?expand_more
大西 健介 has appeared in 3 recorded elections, winning 2 of them. The most recent was 2026.
Who has won Aichi 13th District in recent elections?expand_more
Recorded winners of Aichi 13th District: 石井 拓 (2026); 大西 健介 (2024); 大西 健介 (2021).
How many Aichi districts ran candidates in 2026?expand_more
Aichi had 16 districts with 68 total candidates in 2026, of whom 16 won seats.
Did 大西 健介 win the 2026 election?expand_more
大西 健介 did not win the 2026 House of Representatives race in Aichi 13th District, recording 94,399 votes (36.4%).
Which party did 大西 健介 represent?expand_more
大西 健介 ran as a Centrist candidate. The party fielded 244 candidates in 2026.
Who won Aichi 13th District in 2026?expand_more
石井 拓 (LDP) won Aichi 13th District with 151,944 votes, a vote share of 58.6%.