Candidates
山岸 一生 — Tokyo 9th District 2024
Updated 25 Tháng 5, 2026
- chevron_rightOutcome: Won in Tokyo 9th District (2024) — 75,474 votes (44.1%), rank #1 of 4.
- chevron_rightProfile: Male, age 43. Background: 記者. Status entering: Incumbent.
- chevron_rightCareer wins to date: 2
fact_check Quick Facts
Age
43 yrs
Gender
male ♂ Male
Election Date
Th10 27, 2024
System
Single-member
Seats Recorded
1
Election Performance
Vote Count & Share
Votes
75,474
Vote Share
44.1%
Rank
#1
Outcome
Won
Win/Loss Outcome
Seat
Elected to the House of Representatives
Political Context
Party Affiliation
CDP
立民
Party Candidates 2024
251
Party Seats Won
148
Prefectures
58
Avg Share
39.5%
Occupation & Background
Category記者
Detail元朝日新聞記者、元立憲民主党政務調査会長筆頭補佐
Incumbency & Career Wins
- Status entering the 2024 election: Incumbent
- Total recorded wins to date: 2
- Age at time of election: 43
Comparative Snapshot
Same District Rivals
| Rank | Candidate | Party | Votes | Share |
|---|---|---|---|---|
| #1 | 山岸 一生 this page | CDP | 75,474 | 44.1% |
| #2 | 菅原 一秀 | Independent | 64,798 | 37.9% |
| #3 | 大河内 茂太 | Ishin | 23,488 | 13.7% |
| #4 | 大津 綾香 | みんな | 7,245 | 4.2% |
Same-Party Peers in 2024
- 奥野 総一郎 — Chiba 9th District, 43.9% (Won)
- 西川 将人 — Hokkaido 6th District, 43.9% (Lost)
- 井坂 信彦 — Hyogo 1st District, 43.9% (Won)
- 中谷 一馬 — Kanagawa 7th District, 43.4% (Won)
- 道下 大樹 — Hokkaido 1st District, 43.3% (Won)
Candidates with Similar Vote Share
- 池下 卓 (Ishin, Osaka 10th District) — 44.1%
- 世耕 弘成 (Independent, Wakayama 2nd District) — 44.0%
- 高階 恵美子 (LDP, Shimane 1st District) — 44.0%
- 守島 正 (Ishin, Osaka 2nd District) — 44.2%
- 奥野 総一郎 (CDP, Chiba 9th District) — 43.9%
Career Timeline
Elections
3
Career Wins
2
Total Votes
241,138
Best Vote Share
44.1%
| Year | District | Party | System | Votes | Share | Rank | Result |
|---|---|---|---|---|---|---|---|
| 2026 | Tokyo 9th District | Centrist | Single-member | 56,175 | 30.6% | #2 | Lost |
| 2024 | Tokyo 9th District | CDP | Single-member | 75,474 | 44.1% | #1 | Won |
| 2021 | Tokyo 9th District | CDP | Single-member | 109,489 | 40.9% | #1 | Won |
Tokyo 9th District Historical Context
| Year | Winner | Party | Winning Votes | Winning Share | Field Size | Margin |
|---|---|---|---|---|---|---|
| 2026 | 菅原 一秀 | LDP | 78,927 | 43.0% | 4 | 22,752 |
| 2024 | 山岸 一生 | CDP | 75,474 | 44.1% | 4 | 10,676 |
| 2021 | 山岸 一生 | CDP | 109,489 | 40.9% | 4 | 14,205 |
Tokyo Snapshot (2024)
Districts
30
Candidates
144
Seats Filled
30
Active Parties
11
Party representation across Tokyo
LDP24 cand · 11 won
Ishin22 cand · 0 won
CDP21 cand · 15 won
JCP20 cand · 0 won
Independent19 cand · 3 won
Sanseito19 cand · 0 won
DPP11 cand · 0 won
みんな4 cand · 0 won
Reiwa2 cand · 0 won
Komeito1 cand · 1 won
Minor Parties1 cand · 0 won
Top performers across Tokyo (2024)
| Candidate | District | Party | Votes | Share | Result |
|---|---|---|---|---|---|
| 吉田 晴美 | Tokyo 8th District | CDP | 116,426 | 51.1% | Won |
| 長妻 昭 | Tokyo 27th District | CDP | 112,388 | 54.6% | Won |
| 伊藤 俊輔 | Tokyo 23rd District | CDP | 111,851 | 59.0% | Won |
| 井上 信治 | Tokyo 25th District | LDP | 110,488 | 53.1% | Won |
| 松原 仁 | Tokyo 26th District | Independent | 108,174 | 45.6% | Won |
| 落合 貴之 | Tokyo 6th District | CDP | 107,222 | 47.4% | Won |
| 山花 郁夫 | Tokyo 22nd District | CDP | 99,790 | 40.2% | Won |
Where 山岸 一生 ranks
Among CDP single-member candidates in 2024
Higher vote share than 64.7% (134 of 207)
Among ALL single-member candidates in 2024
Higher vote share than 81.9% (911 of 1113)
記者 cohort (2024)
Cohort Size
23
Cohort Wins
7
Cohort Avg Share
25.6%
Cohort Avg Age
52
山岸 一生's 44.1% vote share is 18.53 percentage points above the 記者 cohort average for 2024.
Frequently Asked Questions
How many times has 山岸 一生 run for the House of Representatives?expand_more
山岸 一生 has appeared in 3 recorded elections, winning 2 of them. The most recent was 2024.
Who has won Tokyo 9th District in recent elections?expand_more
Recorded winners of Tokyo 9th District: 菅原 一秀 (2026); 山岸 一生 (2024); 山岸 一生 (2021).
How many Tokyo districts ran candidates in 2024?expand_more
Tokyo had 30 districts with 144 total candidates in 2024, of whom 30 won seats.
Did 山岸 一生 win the 2024 election?expand_more
山岸 一生 won the 2024 House of Representatives race in Tokyo 9th District, recording 75,474 votes (44.1%).
Which party did 山岸 一生 represent?expand_more
山岸 一生 ran as a CDP candidate. The party fielded 251 candidates in 2024.
Who won Tokyo 9th District in 2024?expand_more
山岸 一生 (CDP) won Tokyo 9th District with 75,474 votes, a vote share of 44.1%.