"It is difficult to keep fostering momentum as things stand," said Suzuki, as reported by Kyodo.

"There's been a variety of problems taking place.

"We can't proceed unless we have thorough discussions and present countermeasures to gain understanding from the public.

"We need to take a hard look at the way the Games previously existed and drastically rethink them."

The ongoing bribery scandal has led to the resignation of former ADK Holdings President Shinichi Ueoni while former Tokyo 2020 Executive Board member Haruyuki Takahashi has been served with four charges.

Chairman of the Kadokawa Corporation publishing company Tsuguhiko Kadokawa has also been charged in relation to the scandal, and has been accused of paying bribes to Takahashi.

Meanwhile last month the headquarters of Japanese advertising company Dentsu were raided over allegations of bid-rigging for Tokyo 2020 test events.

Suzuki is also a vice-president of a joint public-private promotion committee supporting the city's bid for the 2030 Winter Olympics and Paralympics.

"Hosting will lead to the promotion of sports and regional revitalisation," added Suzuki, as reported by Kyodo.

"People are voicing concerns about the effect the scandals might have on the bid.

"First, I want the truth to come out as soon as possible."

After its Executive Board meeting earlier this month, the International Olympic Committee (IOC) announced it was delaying its timeframe for awarding the 2030 Winter Olympics and Paralympics.

The IOC Executive Board has allowed the Future Host Commission more time to "consult deeply with interested parties", according to Olympic Games executive director Christophe Dubi.

Other contenders for the 2030 edition are Salt Lake City in the United States and Vancouver in Canada, although Vancouver's bid has been dealt a blow by the Government of British Columbia not backing its proposal.