Candidates
山口 晋 — Saitama 10th District 2026
Updated 25 Tháng 5, 2026
- chevron_rightOutcome: Won in Saitama 10th District (2026) — 95,847 votes (55.3%), rank #1 of 2.
- chevron_rightProfile: Male, age 42. Background: 大臣. Status entering: Former.
- chevron_rightEndorsed by: 維新
- chevron_rightCareer wins to date: 2
fact_check Quick Facts
Age
42 yrs
Gender
male ♂ Male
Election Date
Th10 22, 2026
System
Single-member
Seats Recorded
1
Election Performance
Vote Count & Share
Votes
95,847
Vote Share
55.3%
Rank
#1
Outcome
Won
Win/Loss Outcome
Seat
Elected to the House of Representatives
Political Context
Party Affiliation
LDP
自民
Party Candidates 2026
353
Party Seats Won
316
Prefectures
58
Avg Share
50.4%
Occupation & Background
Category大臣
Detail元官房長官秘書官
Incumbency & Career Wins
- Status entering the 2026 election: Former
- Total recorded wins to date: 2
- Age at time of election: 42
Endorsements
維新
Comparative Snapshot
Same District Rivals
| Rank | Candidate | Party | Votes | Share |
|---|---|---|---|---|
| #1 | 山口 晋 this page | LDP | 95,847 | 55.3% |
| #2 | 坂本 祐之輔 | Centrist | 77,485 | 44.7% |
Same-Party Peers in 2026
- 向山 淳 — Hokkaido 8th District, 55.3% (Won)
- 古川 康 — Saga 2nd District, 55.5% (Won)
- 福原 淳嗣 — Akita 2nd District, 55.0% (Won)
- 山下 貴司 — Okayama 2nd District, 55.0% (Won)
- 大塚 拓 — Saitama 9th District, 55.0% (Won)
Candidates with Similar Vote Share
- 向山 淳 (LDP, Hokkaido 8th District) — 55.3%
- 古川 康 (LDP, Saga 2nd District) — 55.5%
- 福原 淳嗣 (LDP, Akita 2nd District) — 55.0%
- 山下 貴司 (LDP, Okayama 2nd District) — 55.0%
- 大塚 拓 (LDP, Saitama 9th District) — 55.0%
Career Timeline
Elections
3
Career Wins
2
Total Votes
259,764
Best Vote Share
55.3%
| Year | District | Party | System | Votes | Share | Rank | Result |
|---|---|---|---|---|---|---|---|
| 2026 | Saitama 10th District | LDP | Single-member | 95,847 | 55.3% | #1 | Won |
| 2024 | Saitama 10th District | LDP | Single-member | 67,764 | 41.0% | #2 | Lost |
| 2021 | Saitama 10th District | LDP | Single-member | 96,153 | 51.6% | #1 | Won |
Saitama 10th District Historical Context
| Year | Winner | Party | Winning Votes | Winning Share | Field Size | Margin |
|---|---|---|---|---|---|---|
| 2026 | 山口 晋 | LDP | 95,847 | 55.3% | 2 | 18,362 |
| 2024 | 坂本 祐之輔 | CDP | 97,591 | 59.0% | 2 | 29,827 |
| 2021 | 山口 晋 | LDP | 96,153 | 51.6% | 2 | 5,939 |
Saitama Snapshot (2026)
Districts
16
Candidates
55
Seats Filled
16
Active Parties
9
Party representation across Saitama
LDP16 cand · 16 won
Centrist12 cand · 0 won
Sanseito8 cand · 0 won
JCP6 cand · 0 won
DPP5 cand · 0 won
Ishin4 cand · 0 won
Independent2 cand · 0 won
Reiwa1 cand · 0 won
Minor Parties1 cand · 0 won
Top performers across Saitama (2026)
| Candidate | District | Party | Votes | Share | Result |
|---|---|---|---|---|---|
| 村井 英樹 | Saitama 1st District | LDP | 121,002 | 55.7% | Won |
| 柴山 昌彦 | Saitama 8th District | LDP | 118,529 | 52.4% | Won |
| 田中 良生 | Saitama 15th District | LDP | 114,320 | 52.3% | Won |
| 大塚 拓 | Saitama 9th District | LDP | 112,062 | 55.0% | Won |
| 穂坂 泰 | Saitama 4th District | LDP | 110,312 | 52.9% | Won |
| 中野 英幸 | Saitama 7th District | LDP | 107,470 | 57.2% | Won |
| 井原 隆 | Saitama 5th District | LDP | 104,836 | 47.4% | Won |
Where 山口 晋 ranks
Among LDP single-member candidates in 2026
Higher vote share than 70.3% (201 of 286)
Among ALL single-member candidates in 2026
Higher vote share than 91.9% (1028 of 1119)
大臣 cohort (2026)
Cohort Size
161
Cohort Wins
131
Cohort Avg Share
50.2%
Cohort Avg Age
60
山口 晋's 55.3% vote share is 5.11 percentage points above the 大臣 cohort average for 2026.
Frequently Asked Questions
How many times has 山口 晋 run for the House of Representatives?expand_more
山口 晋 has appeared in 3 recorded elections, winning 2 of them. The most recent was 2026.
Who has won Saitama 10th District in recent elections?expand_more
Recorded winners of Saitama 10th District: 山口 晋 (2026); 坂本 祐之輔 (2024); 山口 晋 (2021).
How many Saitama districts ran candidates in 2026?expand_more
Saitama had 16 districts with 55 total candidates in 2026, of whom 16 won seats.
Did 山口 晋 win the 2026 election?expand_more
山口 晋 won the 2026 House of Representatives race in Saitama 10th District, recording 95,847 votes (55.3%).
Which party did 山口 晋 represent?expand_more
山口 晋 ran as a LDP candidate. The party fielded 353 candidates in 2026.
Who won Saitama 10th District in 2026?expand_more
山口 晋 (LDP) won Saitama 10th District with 95,847 votes, a vote share of 55.3%.