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Each poll as published, with its pollster, fieldwork dates, sample size and a link to the source.

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Sample size is how many people were asked. More people means less random error, never none.
±3 is the margin of error: the real figure is likely within 3 points either way of the one shown.
Two polls can differ because they were taken on different dates, with different methods and different samples.
est. means the institute did not publish a margin of error, so it is estimated from the sample size.
The average smooths this out: it combines recent polls, so one unusual poll cannot swing the picture.

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Polls with institute, dates, sample, margin of error, methodology and results
Institute	Date	Fieldwork	Sample	MoE	Method	Voting intention	Source
Senkyo.com/JX 🇯🇵 Japan · Next Japanese general election	17 Sept 2026	12 Sept 2026 – 13 Sept 2026	1,015	±3.1 est. (Not published: estimated from sample size (95%, simple random sample))	—	Liberal Democratic 29.5% Democratic Party For the People 9.2% Japan Innovation Party 7.8% Team Mirai 7.0% Japanese Communist Party 6.7% Sanseitō 6.0% Constitutional Democratic Party of Japan 6.0% Centrist Reform Alliance 3.7% Conservative Party of Japan 3.0% Komeito 1.9% Reiwa Shinsengumi 1.0% Social Democratic Party 0.5%	Source for Senkyo.com/JX poll (opens in a new tab)
Senkyo.com/JX 🇯🇵 Japan · Next Japanese general election	18 Aug 2026	15 Aug 2026 – 16 Aug 2026	1,016	±3.1 est. (Not published: estimated from sample size (95%, simple random sample))	—	Liberal Democratic 25.4% Democratic Party For the People 9.3% Sanseitō 8.6% Japan Innovation Party 6.8% Japanese Communist Party 6.5% Centrist Reform Alliance 6.4% Team Mirai 6.2% Constitutional Democratic Party of Japan 6.0% Conservative Party of Japan 4.7% Komeito 2.4% Reiwa Shinsengumi 1.0% Social Democratic Party 0.7%	Source for Senkyo.com/JX poll (opens in a new tab)
Senkyo.com/JX 🇯🇵 Japan · Next Japanese general election	14 Jul 2026	11 Jul 2026 – 12 Jul 2026	1,027	±3.1 est. (Not published: estimated from sample size (95%, simple random sample))	—	Liberal Democratic 28.4% Sanseitō 8.1% Democratic Party For the People 7.3% Centrist Reform Alliance 6.8% Japan Innovation Party 6.6% Japanese Communist Party 6.0% Constitutional Democratic Party of Japan 5.4% Conservative Party of Japan 4.7% Team Mirai 4.3% Komeito 2.2% Reiwa Shinsengumi 1.7% Social Democratic Party 0.9%	Source for Senkyo.com/JX poll (opens in a new tab)
Senkyo.com/JX 🇯🇵 Japan · Next Japanese general election	16 Jun 2026	13 Jun 2026 – 14 Jun 2026	1,064	±3.0 est. (Not published: estimated from sample size (95%, simple random sample))	—	Liberal Democratic 31.0% Democratic Party For the People 8.4% Sanseitō 7.7% Centrist Reform Alliance 7.1% Japan Innovation Party 6.1% Japanese Communist Party 5.9% Team Mirai 5.5% Constitutional Democratic Party of Japan 5.3% Conservative Party of Japan 4.1% Komeito 1.9% Reiwa Shinsengumi 1.8% Social Democratic Party 1.4%	Source for Senkyo.com/JX poll (opens in a new tab)
Senkyo.com/JX 🇯🇵 Japan · Next Japanese general election	19 May 2026	16 May 2026 – 17 May 2026	1,025	±3.1 est. (Not published: estimated from sample size (95%, simple random sample))	—	Liberal Democratic 34.3% Centrist Reform Alliance 8.2% Democratic Party For the People 7.1% Japanese Communist Party 6.2% Sanseitō 5.9% Japan Innovation Party 5.2% Constitutional Democratic Party of Japan 4.9% Team Mirai 4.2% Conservative Party of Japan 3.9% Reiwa Shinsengumi 1.5% Komeito 1.4% Social Democratic Party 0.7%	Source for Senkyo.com/JX poll (opens in a new tab)
Senkyo.com/JX 🇯🇵 Japan · Next Japanese general election	14 Apr 2026	11 Apr 2026 – 12 Apr 2026	1,012	±3.1 est. (Not published: estimated from sample size (95%, simple random sample))	—	Liberal Democratic 33.3% Democratic Party For the People 8.8% Centrist Reform Alliance 8.4% Sanseitō 6.9% Constitutional Democratic Party of Japan 5.5% Team Mirai 5.5% Japan Innovation Party 5.4% Japanese Communist Party 4.6% Conservative Party of Japan 3.4% Komeito 2.3% Reiwa Shinsengumi 2.2% Social Democratic Party 0.4%	Source for Senkyo.com/JX poll (opens in a new tab)
Senkyo.com/JX 🇯🇵 Japan · Next Japanese general election	17 Mar 2026	14 Mar 2026 – 15 Mar 2026	1,004	±3.1 est. (Not published: estimated from sample size (95%, simple random sample))	—	Liberal Democratic 32.4% Democratic Party For the People 11.5% Centrist Reform Alliance 9.4% Team Mirai 8.2% Japan Innovation Party 6.2% Japanese Communist Party 5.8% Sanseitō 4.2% Constitutional Democratic Party of Japan 3.3% Conservative Party of Japan 2.8% Komeito 2.0% Reiwa Shinsengumi 1.5% Social Democratic Party 0.6%	Source for Senkyo.com/JX poll (opens in a new tab)

Senkyo.com/JX
🇯🇵 Japan · Next Japanese general election
17 Sept 2026 · n=1,015 · MoE ±3.1 est. (Not published: estimated from sample size (95%, simple random sample)) · Method n/a
- Liberal Democratic29.5%
- Democratic Party For the People9.2%
- Japan Innovation Party7.8%
- Team Mirai7.0%
- Japanese Communist Party6.7%
- Sanseitō6.0%
- Constitutional Democratic Party of Japan6.0%
- Centrist Reform Alliance3.7%
- Conservative Party of Japan3.0%
- Komeito1.9%
- Reiwa Shinsengumi1.0%
- Social Democratic Party0.5%
View original source
Senkyo.com/JX
🇯🇵 Japan · Next Japanese general election
18 Aug 2026 · n=1,016 · MoE ±3.1 est. (Not published: estimated from sample size (95%, simple random sample)) · Method n/a
- Liberal Democratic25.4%
- Democratic Party For the People9.3%
- Sanseitō8.6%
- Japan Innovation Party6.8%
- Japanese Communist Party6.5%
- Centrist Reform Alliance6.4%
- Team Mirai6.2%
- Constitutional Democratic Party of Japan6.0%
- Conservative Party of Japan4.7%
- Komeito2.4%
- Reiwa Shinsengumi1.0%
- Social Democratic Party0.7%
View original source
Senkyo.com/JX
🇯🇵 Japan · Next Japanese general election
14 Jul 2026 · n=1,027 · MoE ±3.1 est. (Not published: estimated from sample size (95%, simple random sample)) · Method n/a
- Liberal Democratic28.4%
- Sanseitō8.1%
- Democratic Party For the People7.3%
- Centrist Reform Alliance6.8%
- Japan Innovation Party6.6%
- Japanese Communist Party6.0%
- Constitutional Democratic Party of Japan5.4%
- Conservative Party of Japan4.7%
- Team Mirai4.3%
- Komeito2.2%
- Reiwa Shinsengumi1.7%
- Social Democratic Party0.9%
View original source
Senkyo.com/JX
🇯🇵 Japan · Next Japanese general election
16 Jun 2026 · n=1,064 · MoE ±3.0 est. (Not published: estimated from sample size (95%, simple random sample)) · Method n/a
- Liberal Democratic31.0%
- Democratic Party For the People8.4%
- Sanseitō7.7%
- Centrist Reform Alliance7.1%
- Japan Innovation Party6.1%
- Japanese Communist Party5.9%
- Team Mirai5.5%
- Constitutional Democratic Party of Japan5.3%
- Conservative Party of Japan4.1%
- Komeito1.9%
- Reiwa Shinsengumi1.8%
- Social Democratic Party1.4%
View original source
Senkyo.com/JX
🇯🇵 Japan · Next Japanese general election
19 May 2026 · n=1,025 · MoE ±3.1 est. (Not published: estimated from sample size (95%, simple random sample)) · Method n/a
- Liberal Democratic34.3%
- Centrist Reform Alliance8.2%
- Democratic Party For the People7.1%
- Japanese Communist Party6.2%
- Sanseitō5.9%
- Japan Innovation Party5.2%
- Constitutional Democratic Party of Japan4.9%
- Team Mirai4.2%
- Conservative Party of Japan3.9%
- Reiwa Shinsengumi1.5%
- Komeito1.4%
- Social Democratic Party0.7%
View original source
Senkyo.com/JX
🇯🇵 Japan · Next Japanese general election
14 Apr 2026 · n=1,012 · MoE ±3.1 est. (Not published: estimated from sample size (95%, simple random sample)) · Method n/a
- Liberal Democratic33.3%
- Democratic Party For the People8.8%
- Centrist Reform Alliance8.4%
- Sanseitō6.9%
- Constitutional Democratic Party of Japan5.5%
- Team Mirai5.5%
- Japan Innovation Party5.4%
- Japanese Communist Party4.6%
- Conservative Party of Japan3.4%
- Komeito2.3%
- Reiwa Shinsengumi2.2%
- Social Democratic Party0.4%
View original source
Senkyo.com/JX
🇯🇵 Japan · Next Japanese general election
17 Mar 2026 · n=1,004 · MoE ±3.1 est. (Not published: estimated from sample size (95%, simple random sample)) · Method n/a
- Liberal Democratic32.4%
- Democratic Party For the People11.5%
- Centrist Reform Alliance9.4%
- Team Mirai8.2%
- Japan Innovation Party6.2%
- Japanese Communist Party5.8%
- Sanseitō4.2%
- Constitutional Democratic Party of Japan3.3%
- Conservative Party of Japan2.8%
- Komeito2.0%
- Reiwa Shinsengumi1.5%
- Social Democratic Party0.6%
View original source

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