Candidates
岡本 三成 — Tokyo 12th District 2021
Updated 25 Tháng 5, 2026
- chevron_rightOutcome: Won in Tokyo 12th District (2021) — 101,020 votes (39.9%), rank #1 of 3.
- chevron_rightProfile: Male, age 56. Background: 政務官. Status entering: Incumbent.
- chevron_rightEndorsed by: 自民
- chevron_rightCareer wins to date: 4
fact_check Quick Facts
Age
56 yrs
Gender
male ♂ Male
Election Date
Th10 31, 2021
System
Single-member
Seats Recorded
1
Election Performance
Vote Count & Share
Votes
101,020
Vote Share
39.9%
Rank
#1
Outcome
Won
Win/Loss Outcome
Seat
Elected to the House of Representatives
Political Context
Party Affiliation
Komeito
公明
Party Candidates 2021
32
Party Seats Won
32
Prefectures
16
Avg Share
51.7%
Occupation & Background
Category政務官
Detail元外務政務官、公明党国土交通部会長
Incumbency & Career Wins
- Status entering the 2021 election: Incumbent
- Total recorded wins to date: 4
- Age at time of election: 56
Endorsements
自民
Comparative Snapshot
Same District Rivals
| Rank | Candidate | Party | Votes | Share |
|---|---|---|---|---|
| #1 | 岡本 三成 this page | Komeito | 101,020 | 39.9% |
| #2 | 阿部 司 | Ishin | 80,323 | 31.7% |
| #3 | 池内 沙織 | JCP | 71,948 | 28.4% |
Same-Party Peers in 2021
- 佐藤 茂樹 — Osaka 3rd District, 44.7% (Won)
- 北側 一雄 — Osaka 16th District, 50.8% (Won)
- 国重 徹 — Osaka 5th District, 53.1% (Won)
- 稲津 久 — Hokkaido 10th District, 53.9% (Won)
- 赤羽 一嘉 — Hyogo 2nd District, 54.2% (Won)
Candidates with Similar Vote Share
- 塚田 一郎 (LDP, Niigata 1st District) — 39.9%
- 原田 和広 (CDP, Yamagata 1st District) — 40.0%
- 平井 卓也 (LDP, Kagawa 1st District) — 40.0%
- 大河原 雅子 (CDP, Tokyo 21st District) — 40.1%
- 山花 郁夫 (CDP, Tokyo 22nd District) — 40.1%
Career Timeline
Elections
3
Career Wins
3
Total Votes
161,120
Best Vote Share
39.9%
| Year | District | Party | System | Votes | Share | Rank | Result |
|---|---|---|---|---|---|---|---|
| 2026 | Tokyo Block (PR Block) | Centrist | PR Block | 0 | 0.0% | #4 | Won |
| 2024 | Tokyo 29th District | Komeito | Single-member | 60,100 | 33.2% | #1 | Won |
| 2021 | Tokyo 12th District | Komeito | Single-member | 101,020 | 39.9% | #1 | Won |
Tokyo 12th District Historical Context
| Year | Winner | Party | Winning Votes | Winning Share | Field Size | Margin |
|---|---|---|---|---|---|---|
| 2026 | 高木 啓 | LDP | 78,774 | 35.0% | 6 | 34,640 |
| 2024 | 高木 啓 | LDP | 68,878 | 33.3% | 4 | 16,645 |
| 2021 | 岡本 三成 | KOMEITO | 101,020 | 39.9% | 3 | 20,697 |
Tokyo Snapshot (2021)
Districts
25
Candidates
96
Seats Filled
25
Active Parties
13
Party representation across Tokyo
LDP24 cand · 16 won
CDP20 cand · 8 won
Ishin17 cand · 0 won
Independent14 cand · 0 won
JCP9 cand · 0 won
NHK Party3 cand · 0 won
DPP2 cand · 0 won
Reiwa2 cand · 0 won
Komeito1 cand · 1 won
第一1 cand · 0 won
SDP1 cand · 0 won
やまと1 cand · 0 won
Minor Parties1 cand · 0 won
Top performers across Tokyo (2021)
| Candidate | District | Party | Votes | Share | Result |
|---|---|---|---|---|---|
| 萩生田 光一 | Tokyo 24th District | LDP | 149,152 | 58.5% | Won |
| 吉田 晴美 | Tokyo 8th District | CDP | 137,341 | 48.4% | Won |
| 小倉 將信 | Tokyo 23rd District | LDP | 133,206 | 51.2% | Won |
| 井上 信治 | Tokyo 25th District | LDP | 131,430 | 59.4% | Won |
| 伊藤 達也 | Tokyo 22nd District | LDP | 131,351 | 46.9% | Won |
| 平 将明 | Tokyo 4th District | LDP | 128,708 | 51.5% | Won |
| 伊藤 俊輔 | Tokyo 23rd District | CDP | 126,732 | 48.8% | Lost |
Where 岡本 三成 ranks
Among Komeito single-member candidates in 2021
Higher vote share than 0% (0 of 9)
Among ALL single-member candidates in 2021
Higher vote share than 54.7% (469 of 857)
政務官 cohort (2021)
Cohort Size
107
Cohort Wins
67
Cohort Avg Share
45.6%
Cohort Avg Age
52
岡本 三成's 39.9% vote share is 5.72 percentage points below the 政務官 cohort average for 2021.
Frequently Asked Questions
How many times has 岡本 三成 run for the House of Representatives?expand_more
岡本 三成 has appeared in 3 recorded elections, winning 3 of them. The most recent was 2021.
Who has won Tokyo 12th District in recent elections?expand_more
Recorded winners of Tokyo 12th District: 高木 啓 (2026); 高木 啓 (2024); 岡本 三成 (2021).
How many Tokyo districts ran candidates in 2021?expand_more
Tokyo had 25 districts with 96 total candidates in 2021, of whom 25 won seats.
Did 岡本 三成 win the 2021 election?expand_more
岡本 三成 won the 2021 House of Representatives race in Tokyo 12th District, recording 101,020 votes (39.9%).
Which party did 岡本 三成 represent?expand_more
岡本 三成 ran as a Komeito candidate. The party fielded 32 candidates in 2021.
Who won Tokyo 12th District in 2021?expand_more
岡本 三成 (Komeito) won Tokyo 12th District with 101,020 votes, a vote share of 39.9%.