Candidates
吉田 大成 — Kanagawa 9th District 2021
Updated 25 Tháng 5, 2026
- chevron_rightOutcome: Lost in Kanagawa 9th District (2021) — 24,547 votes (12.4%), rank #3 of 4.
- chevron_rightProfile: Male, age 51. Background: 政治スタッフ. Status entering: Newcomer.
fact_check Quick Facts
Age
51 yrs
Gender
male ♂ Male
Election Date
Th10 31, 2021
System
Single-member
Seats Recorded
—
Election Performance
Vote Count & Share
Votes
24,547
Vote Share
12.4%
Rank
#3
Outcome
Lost
Win/Loss Outcome
Outcome
Did not win seat in 2021
Political Context
Party Affiliation
Ishin
維新
Party Candidates 2021
119
Party Seats Won
41
Prefectures
38
Avg Share
23.7%
Occupation & Background
Category政治スタッフ
Detail元神奈川県議会議員、元衆議院議員秘書
Incumbency & Career Wins
- Status entering the 2021 election: Newcomer
- Age at time of election: 51
Comparative Snapshot
Same District Rivals
| Rank | Candidate | Party | Votes | Share |
|---|---|---|---|---|
| #1 | 笠 浩史 | CDP | 83,847 | 42.4% |
| #2 | 中山 展宏 | LDP | 68,918 | 34.9% |
| #3 | 吉田 大成 this page | Ishin | 24,547 | 12.4% |
| #4 | 斉藤 温 | JCP | 20,432 | 10.3% |
Same-Party Peers in 2021
- 小和田 康文 — Hokkaido 3rd District, 12.4% (Lost)
- 内山 晃 — Chiba 7th District, 12.3% (Lost)
- 外山 斎 — Miyazaki 1st District, 12.0% (Lost)
- 藤川 隆史 — Tokyo 10th District, 11.6% (Lost)
- 新開 崇司 — Fukuoka 2nd District, 11.5% (Lost)
Candidates with Similar Vote Share
- 小和田 康文 (Ishin, Hokkaido 3rd District) — 12.4%
- 斉藤 敦子 (Independent, Gunma 1st District) — 12.3%
- 内山 晃 (Ishin, Chiba 7th District) — 12.3%
- 円 より子 (DPP, Tokyo 17th District) — 12.6%
- 萩原 活 (Independent, Nagasaki 4th District) — 12.7%
Career Timeline
Elections
2
Career Wins
0
Total Votes
48,830
Best Vote Share
12.8%
| Year | District | Party | System | Votes | Share | Rank | Result |
|---|---|---|---|---|---|---|---|
| 2024 | Kanagawa 9th District | Ishin | Single-member | 24,283 | 12.8% | #3 | Lost |
| 2021 | Kanagawa 9th District | Ishin | Single-member | 24,547 | 12.4% | #3 | Lost |
Kanagawa 9th District Historical Context
| Year | Winner | Party | Winning Votes | Winning Share | Field Size | Margin |
|---|---|---|---|---|---|---|
| 2026 | 上原 正裕 | LDP | 87,531 | 46.6% | 3 | 3,507 |
| 2024 | 笠 浩史 | CDP | 93,878 | 49.6% | 4 | 41,520 |
| 2021 | 笠 浩史 | CDP | 83,847 | 42.4% | 4 | 14,929 |
Kanagawa Snapshot (2021)
Districts
18
Candidates
51
Seats Filled
18
Active Parties
8
Party representation across Kanagawa
LDP17 cand · 11 won
CDP15 cand · 7 won
Ishin7 cand · 0 won
JCP5 cand · 0 won
Independent4 cand · 0 won
DPP1 cand · 0 won
SDP1 cand · 0 won
NHK Party1 cand · 0 won
Top performers across Kanagawa (2021)
| Candidate | District | Party | Votes | Share | Result |
|---|---|---|---|---|---|
| 河野 太郎 | Kanagawa 15th District | LDP | 210,515 | 79.3% | Won |
| 小泉 進次郎 | Kanagawa 11th District | LDP | 147,634 | 79.2% | Won |
| 菅 義偉 | Kanagawa 2nd District | LDP | 146,166 | 61.1% | Won |
| 後藤 祐一 | Kanagawa 16th District | CDP | 137,558 | 54.6% | Won |
| 坂井 学 | Kanagawa 5th District | LDP | 136,288 | 53.5% | Won |
| 赤間 二郎 | Kanagawa 14th District | LDP | 135,197 | 53.8% | Won |
| 牧島 かれん | Kanagawa 17th District | LDP | 131,284 | 55.3% | Won |
Where 吉田 大成 ranks
Among Ishin single-member candidates in 2021
Higher vote share than 19.1% (18 of 94)
Among ALL single-member candidates in 2021
Higher vote share than 21.2% (182 of 857)
政治スタッフ cohort (2021)
Cohort Size
43
Cohort Wins
3
Cohort Avg Share
28.4%
Cohort Avg Age
48
吉田 大成's 12.4% vote share is 15.99 percentage points below the 政治スタッフ cohort average for 2021.
Frequently Asked Questions
How many times has 吉田 大成 run for the House of Representatives?expand_more
吉田 大成 has appeared in 2 recorded elections, winning 0 of them. The most recent was 2021.
Who has won Kanagawa 9th District in recent elections?expand_more
Recorded winners of Kanagawa 9th District: 上原 正裕 (2026); 笠 浩史 (2024); 笠 浩史 (2021).
How many Kanagawa districts ran candidates in 2021?expand_more
Kanagawa had 18 districts with 51 total candidates in 2021, of whom 18 won seats.
Did 吉田 大成 win the 2021 election?expand_more
吉田 大成 did not win the 2021 House of Representatives race in Kanagawa 9th District, recording 24,547 votes (12.4%).
Which party did 吉田 大成 represent?expand_more
吉田 大成 ran as a Ishin candidate. The party fielded 119 candidates in 2021.
Who won Kanagawa 9th District in 2021?expand_more
笠 浩史 (CDP) won Kanagawa 9th District with 83,847 votes, a vote share of 42.4%.