The Reuters Corporate Survey shows the Olympics did not help keep support for Suga from sliding below a make-or-break 30 percent threshold in some domestic media polls, clouding the fate of his premiership.

"I cannot hold expectations for the opposition but at least the Suga administration should change," a manager of an information service firm wrote in the survey.

Even if the ruling bloc manages to stay in power through the elections, Suga could come under pressure to step down if his coalition loses enough seats, some analysts say.

The ruling Liberal Democratic Party (LDP) "may be a better choice in terms of corona response and quality of policymakers," a chemicals maker manager wrote.

"That doesn't mean the ruling bloc should win more seats though. I want it to end up with fewer seats to hold a little over majority so it may regain a sense of urgency."

To be sure, few companies expected change of power through the elections due to weak opposition parties. But many expected the ruling camp to lose seats at the election.

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