Workers are seen outside the New National Stadium, the main stadium of Tokyo 2020 Olympics and Paralympics.
The Reuters Corporate Survey found Japanese firms have a gloomier outlook of the economy, with 65% of respondents expecting the economy to contract after the Olympics.
Some 65% also urged the government to compile fresh economic stimulus to underpin a fragile economy after the 2020 Olympics.
There's a risk of private consumption falling sharply after the Olympics," a manager at a transport equipment maker wrote in the survey.
"An economic boom triggered by the Olympics may help avoid a slump temporarily.