Tokyo's quest for the 2020 Summer Olympic Games is helping to heal the wounds left by last year's twin quake and tsunami disasters, bid leader Tsunekazu Takeda says.

The 65-year-old - who was elected to the International Olympic Committee (IOC) before the London Games - added the economic spin-off from winning hosting rights would have a hugely-positive effect on the country.

"This bid is a vivid demonstration of the power of sport with athletes and sport playing a key role at the heart of society after a difficult time," Takeda told AFP in an interview.

"Without a doubt, Tohoku (the region affected by the tsunami) and the rest of Japan will benefit from the Games.

"According to calculations provided by the city of Tokyo, the economic effect on the nation as a whole is estimated at $US38 billion ($A36.8 billion).

"Studies conducted by the Tokyo 2020 Olympic and Paralympic Bid Committee ... show that the Games would create more than 150,000 jobs nationwide."

Takeda, who like his late father Prince Tsuneyoshi Takeda was an accomplished show jumper, said while many might have Tokyo as the frontrunner over Istanbul and Madrid, he had little time for such tags.

"Bidding for the Olympic and Paralympic Games is no mere event," he said.

"We believe that each of the cities bidding to host the Games is incredibly motivated and has some very interesting concepts.

"I'm not interested in whether Tokyo is today's frontrunner. I want Tokyo to be tomorrow's winner."

Takeda, who along with his team will learn their fate at the vote of the 100-plus IOC members in Buenos Aires on September 7 next year, believes this Tokyo bid has learnt from the previous one which came third to Rio de Janeiro for the 2016 edition.

"Tokyo 2020 is an enhanced bid. We kept the best and improved the rest.

"We have revised our plans in a number of key areas: the main stadium, new village location and better use of transportation and other infrastructures.

"We have a new committee, a new team and new plans."

On that note Takeda, who is the great grandson of Emperor Meiji who ruled Japan from 1867-1912, said despite the recent resignation of the charismatic and unpredictable Shintaro Ishihara as Governor of Tokyo, the bid retained support at local level.