Candidates
山口 誠太郎 — Kumamoto 1st District 2026
Updated 25 Tháng 5, 2026
- chevron_rightOutcome: Lost in Kumamoto 1st District (2026) — 28,055 votes (12.3%), rank #3 of 3.
- chevron_rightProfile: Male, age 36. Background: 官僚. Status entering: Newcomer.
fact_check Quick Facts
Age
36 yrs
Gender
male ♂ Male
Election Date
Th10 22, 2026
System
Single-member
Seats Recorded
—
Election Performance
Vote Count & Share
Votes
28,055
Vote Share
12.3%
Rank
#3
Outcome
Lost
Win/Loss Outcome
Outcome
Did not win seat in 2026
Political Context
Party Affiliation
Sanseito
参政
Party Candidates 2026
197
Party Seats Won
15
Prefectures
56
Avg Share
10.8%
Occupation & Background
Category官僚
Detail税理士事務所職員
Incumbency & Career Wins
- Status entering the 2026 election: Newcomer
- Age at time of election: 36
Comparative Snapshot
Same District Rivals
| Rank | Candidate | Party | Votes | Share |
|---|---|---|---|---|
| #1 | 木原 稔 | LDP | 144,036 | 63.2% |
| #2 | 鎌田 聡 | Centrist | 55,802 | 24.5% |
| #3 | 山口 誠太郎 this page | Sanseito | 28,055 | 12.3% |
Same-Party Peers in 2026
- 原田 慎太郎 — Ehime 2nd District, 12.3% (Lost)
- 川 裕一郎 — Ishikawa 1st District, 12.5% (Lost)
- 雨宮 裕子 — Saitama 14th District, 12.5% (Lost)
- 月足 舞子 — Osaka 6th District, 12.0% (Lost)
- 川端 絢美 — Ibaraki 1st District, 12.0% (Lost)
Candidates with Similar Vote Share
- 亀岡 偉一 (Independent, Fukushima 1st District) — 12.3%
- 原田 慎太郎 (Sanseito, Ehime 2nd District) — 12.3%
- 稲葉 太郎 (Ishin, Tokyo 5th District) — 12.2%
- 杉本 葵 (DPP, Nara 1st District) — 12.2%
- 石関 貴史 (Independent, Gunma 2nd District) — 12.2%
Kumamoto 1st District Historical Context
| Year | Winner | Party | Winning Votes | Winning Share | Field Size | Margin |
|---|---|---|---|---|---|---|
| 2026 | 木原 稔 | LDP | 144,036 | 63.2% | 3 | 88,234 |
| 2024 | 木原 稔 | LDP | 110,068 | 55.1% | 3 | 45,830 |
| 2021 | 木原 稔 | LDP | 131,371 | 61.0% | 2 | 47,529 |
Kumamoto Snapshot (2026)
Districts
4
Candidates
14
Seats Filled
4
Active Parties
7
Party representation across Kumamoto
LDP4 cand · 4 won
Sanseito4 cand · 0 won
JCP2 cand · 0 won
Centrist1 cand · 0 won
SDP1 cand · 0 won
Ishin1 cand · 0 won
DPP1 cand · 0 won
Top performers across Kumamoto (2026)
| Candidate | District | Party | Votes | Share | Result |
|---|---|---|---|---|---|
| 木原 稔 | Kumamoto 1st District | LDP | 144,036 | 63.2% | Won |
| 金子 恭之 | Kumamoto 4th District | LDP | 141,699 | 66.2% | Won |
| 坂本 哲志 | Kumamoto 3rd District | LDP | 116,925 | 66.6% | Won |
| 西野 太亮 | Kumamoto 2nd District | LDP | 115,583 | 71.5% | Won |
| 鎌田 聡 | Kumamoto 1st District | Centrist | 55,802 | 24.5% | Lost |
| 霍田 和佳 | Kumamoto 3rd District | Sanseito | 32,850 | 18.7% | Lost |
| 前田 智徳 | Kumamoto 2nd District | Sanseito | 31,019 | 19.2% | Lost |
Where 山口 誠太郎 ranks
Among Sanseito single-member candidates in 2026
Higher vote share than 74.2% (135 of 182)
Among ALL single-member candidates in 2026
Higher vote share than 36.2% (405 of 1119)
官僚 cohort (2026)
Cohort Size
38
Cohort Wins
7
Cohort Avg Share
23.7%
Cohort Avg Age
45
山口 誠太郎's 12.3% vote share is 11.42 percentage points below the 官僚 cohort average for 2026.
Frequently Asked Questions
Who has won Kumamoto 1st District in recent elections?expand_more
Recorded winners of Kumamoto 1st District: 木原 稔 (2026); 木原 稔 (2024); 木原 稔 (2021).
How many Kumamoto districts ran candidates in 2026?expand_more
Kumamoto had 4 districts with 14 total candidates in 2026, of whom 4 won seats.
Did 山口 誠太郎 win the 2026 election?expand_more
山口 誠太郎 did not win the 2026 House of Representatives race in Kumamoto 1st District, recording 28,055 votes (12.3%).
Which party did 山口 誠太郎 represent?expand_more
山口 誠太郎 ran as a Sanseito candidate. The party fielded 197 candidates in 2026.
Who won Kumamoto 1st District in 2026?expand_more
木原 稔 (LDP) won Kumamoto 1st District with 144,036 votes, a vote share of 63.2%.