Candidates
大西 健介 — Aichi 13th District 2021
Updated 25 Tháng 5, 2026
- chevron_rightOutcome: Won in Aichi 13th District (2021) — 134,033 votes (52.7%), rank #1 of 2.
- chevron_rightProfile: Male, age 50. Background: 政党役職. Status entering: Incumbent.
- chevron_rightCareer wins to date: 5
fact_check Quick Facts
Age
50 yrs
Gender
male ♂ Male
Election Date
Th10 31, 2021
System
Single-member
Seats Recorded
1
Election Performance
Vote Count & Share
Votes
134,033
Vote Share
52.7%
Rank
#1
Outcome
Won
Win/Loss Outcome
Seat
Elected to the House of Representatives
Political Context
Party Affiliation
CDP
立民
Party Candidates 2021
253
Party Seats Won
96
Prefectures
58
Avg Share
39.0%
Occupation & Background
Category政党役職
Detail立憲民主党政務調査会長代理、元衆議院議員秘書
Incumbency & Career Wins
- Status entering the 2021 election: Incumbent
- Total recorded wins to date: 5
- Age at time of election: 50
Comparative Snapshot
Same District Rivals
| Rank | Candidate | Party | Votes | Share |
|---|---|---|---|---|
| #1 | 大西 健介 this page | CDP | 134,033 | 52.7% |
| #2 | 石井 拓 | LDP | 120,203 | 47.3% |
Same-Party Peers in 2021
- 逢坂 誠二 — Hokkaido 8th District, 52.7% (Won)
- 小山 展弘 — Shizuoka 3rd District, 52.7% (Won)
- 重徳 和彦 — Aichi 12th District, 52.7% (Won)
- 江田 憲司 — Kanagawa 8th District, 52.6% (Won)
- 西村 智奈美 — Niigata 1st District, 52.6% (Won)
Candidates with Similar Vote Share
- 逢坂 誠二 (CDP, Hokkaido 8th District) — 52.7%
- 小山 展弘 (CDP, Shizuoka 3rd District) — 52.7%
- 長坂 康正 (LDP, Aichi 9th District) — 52.7%
- 重徳 和彦 (CDP, Aichi 12th District) — 52.7%
- 武村 展英 (LDP, Shiga 3rd District) — 52.8%
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 (2021)
Districts
15
Candidates
41
Seats Filled
15
Active Parties
8
Party representation across Aichi
LDP15 cand · 11 won
CDP13 cand · 3 won
JCP5 cand · 0 won
Ishin3 cand · 0 won
Reiwa2 cand · 0 won
NHK Party1 cand · 0 won
DPP1 cand · 1 won
Independent1 cand · 0 won
Top performers across Aichi (2021)
| Candidate | District | Party | Votes | Share | Result |
|---|---|---|---|---|---|
| 八木 哲也 | Aichi 11th District | LDP | 158,018 | 69.1% | Won |
| 鈴木 淳司 | Aichi 7th District | LDP | 144,725 | 54.7% | Won |
| 重徳 和彦 | Aichi 12th District | CDP | 142,536 | 52.7% | Won |
| 丹羽 秀樹 | Aichi 6th District | LDP | 136,168 | 58.3% | Won |
| 古川 元久 | Aichi 2nd District | DPP | 131,397 | 62.3% | Won |
| 青山 周平 | Aichi 12th District | LDP | 128,083 | 47.3% | Lost |
| 伊藤 忠彦 | Aichi 8th District | LDP | 121,714 | 50.2% | Won |
Where 大西 健介 ranks
Among CDP single-member candidates in 2021
Higher vote share than 92.1% (197 of 214)
Among ALL single-member candidates in 2021
Higher vote share than 83.2% (713 of 857)
政党役職 cohort (2021)
Cohort Size
210
Cohort Wins
98
Cohort Avg Share
33.5%
Cohort Avg Age
56
大西 健介's 52.7% vote share is 19.17 percentage points above the 政党役職 cohort average for 2021.
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 2021.
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 2021?expand_more
Aichi had 15 districts with 41 total candidates in 2021, of whom 15 won seats.
Did 大西 健介 win the 2021 election?expand_more
大西 健介 won the 2021 House of Representatives race in Aichi 13th District, recording 134,033 votes (52.7%).
Which party did 大西 健介 represent?expand_more
大西 健介 ran as a CDP candidate. The party fielded 253 candidates in 2021.
Who won Aichi 13th District in 2021?expand_more
大西 健介 (CDP) won Aichi 13th District with 134,033 votes, a vote share of 52.7%.