Bid president Tsunekazu Takeda says the region would host the torch relay and soccer matches if Tokyo wins the three-city contest.
Takeda tells The Associated Press on Thursday that "we would like to show the actual recovery of this area for people of all the world who gave us big support."
Tokyo is promoting the 2020 bid as a symbol of Japan's response to the March 2011 natural disaster.
Takeda spoke after being elected an International Olympic Committee member.
IOC members will select Tokyo, Istanbul or Madrid as 2020 host in September 2013.