Candidates
山岸 一生 — Tokyo 9th District 2026
Updated 25 Tháng 5, 2026
- chevron_rightOutcome: Lost in Tokyo 9th District (2026) — 56,175 votes (30.6%), rank #2 of 4.
- chevron_rightProfile: Male, age 44. Background: 記者. Status entering: Incumbent.
- chevron_rightCareer wins to date: 2
fact_check Quick Facts
Age
44 yrs
Gender
male ♂ Male
Election Date
Th10 22, 2026
System
Single-member
Seats Recorded
—
Election Performance
Vote Count & Share
Votes
56,175
Vote Share
30.6%
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記者
Detail元朝日新聞記者
Incumbency & Career Wins
- Status entering the 2026 election: Incumbent
- Total recorded wins to date: 2
- Age at time of election: 44
Comparative Snapshot
Same District Rivals
| Rank | Candidate | Party | Votes | Share |
|---|---|---|---|---|
| #1 | 菅原 一秀 | LDP | 78,927 | 43.0% |
| #2 | 山岸 一生 this page | Centrist | 56,175 | 30.6% |
| #3 | 薬師寺 道代 | DPP | 32,670 | 17.8% |
| #4 | 鈴木 文哉 | Sanseito | 15,638 | 8.5% |
Same-Party Peers in 2026
- 松木 謙公 — Hokkaido 2nd District, 30.4% (Lost)
- 柳沢 剛 — Miyagi 3rd District, 30.9% (Lost)
- 佐々木 奈保美 — Kanagawa 17th District, 30.9% (Lost)
- 多ケ谷 亮 — Chiba 11th District, 30.2% (Lost)
- 小林 華弥子 — Oita 3rd District, 30.2% (Lost)
Candidates with Similar Vote Share
- 近藤 雅彦 (DPP, Fukuoka 6th District) — 30.7%
- 許斐 亮太郎 (DPP, Fukuoka 4th District) — 30.8%
- 松木 謙公 (Centrist, Hokkaido 2nd District) — 30.4%
- 村上 智信 (Ishin, Fukuoka 11th District) — 30.8%
- 松原 仁 (Independent, Tokyo 26th District) — 30.8%
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 (2026)
Districts
30
Candidates
154
Seats Filled
30
Active Parties
12
Party representation across Tokyo
LDP30 cand · 30 won
Sanseito30 cand · 0 won
DPP27 cand · 0 won
Centrist24 cand · 0 won
JCP13 cand · 0 won
Ishin11 cand · 0 won
Minor Parties6 cand · 0 won
Independent4 cand · 0 won
Mirai3 cand · 0 won
保守2 cand · 0 won
減ゆ2 cand · 0 won
Reiwa2 cand · 0 won
Top performers across Tokyo (2026)
| Candidate | District | Party | Votes | Share | Result |
|---|---|---|---|---|---|
| 伊藤 達也 | Tokyo 22nd District | LDP | 132,689 | 51.5% | Won |
| 鈴木 隼人 | Tokyo 10th District | LDP | 126,044 | 49.1% | Won |
| 福田 かおる | Tokyo 18th District | LDP | 117,383 | 47.7% | Won |
| 平 将明 | Tokyo 4th District | LDP | 114,054 | 49.4% | Won |
| 長島 昭久 | Tokyo 30th District | LDP | 110,453 | 45.2% | Won |
| 松島 みどり | Tokyo 14th District | LDP | 109,892 | 50.2% | Won |
| 井上 信治 | Tokyo 25th District | LDP | 109,606 | 50.5% | Won |
Where 山岸 一生 ranks
Among Centrist single-member candidates in 2026
Higher vote share than 49.5% (100 of 202)
Among ALL single-member candidates in 2026
Higher vote share than 61.9% (693 of 1119)
記者 cohort (2026)
Cohort Size
22
Cohort Wins
4
Cohort Avg Share
30.8%
Cohort Avg Age
43
山岸 一生's 30.6% vote share is 0.22 percentage points below the 記者 cohort average for 2026.
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 2026.
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 2026?expand_more
Tokyo had 30 districts with 154 total candidates in 2026, of whom 30 won seats.
Did 山岸 一生 win the 2026 election?expand_more
山岸 一生 did not win the 2026 House of Representatives race in Tokyo 9th District, recording 56,175 votes (30.6%).
Which party did 山岸 一生 represent?expand_more
山岸 一生 ran as a Centrist candidate. The party fielded 244 candidates in 2026.
Who won Tokyo 9th District in 2026?expand_more
菅原 一秀 (LDP) won Tokyo 9th District with 78,927 votes, a vote share of 43.0%.