Observing Japan

Observing Japan

Opinion polls

Polls point to fluid upper house campaign

The government loses ground as the campaign draws near

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Tobias Harris
Jun 30, 2025
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If you are looking for timely, forward-looking analysis of the stories in Japans’s politics and policymaking that move markets, I have launched a new service through my business, Japan Foresight LLC. For more information about Japan Foresight’s services or for information on how to sign up for a trial or schedule a briefing, please visit our website or reach out to me.

All readers can access regularly updated charts of a ten-day moving average of the government’s popularity here.

Paid subscribers will receive my analytical forecast of the upper house campaign within the next week; other subscribers will have the opportunity to purchase the report. I will also hold a call to launch the report next week. Stay tuned for more information.


Prime Minister Ishiba Shigeru discusses the LDP’s upper house campaign with the secretaries general of the LDP’s prefectural chapters. Source: LDP

The Ishiba government continues to cede some of the ground it recovered in opinion polls after Koizumi Shinjirō joined in the government in May. A new round of opinion polls conducted over the weekend by NHK, the Yomiuri Shimbun, Nikkei Shimbun, and the Mainichi Shimbun saw the government’s moving average approval drop back to roughly 30% and its average disapproval climb back above 50%; after dipping under -13 in mid-June, its net approval is once again above -23. The numbers look only slightly better when adjusting for pollster biases, with net approval of -20.8. (Polling data and more information about my methodology is available here.)

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