Tokyo organizers said Tuesday they have no “B Plan” in the event the Olympics need to be postponed again because of the coronavirus pandemic.

Masa Takaya, the spokesman for the Tokyo Olympics, said organizers are proceeding under the assumption the Olympics will open on July 23, 2021. The Paralympics follow on Aug. 24.

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Those dates were set last month by the International Olympic Committee and Japanese officials after the coronavirus pandemic made it clear the Olympics could not be held as scheduled this summer.

“We are working toward the new goal,” Takaya said, speaking in English on a teleconference call with journalists. “We don’t have a B Plan.”

The severity of the pandemic and the death toll has raised questions if it will even be feasible to hold the Olympics in just over 15 months. Several Japanese journalists raised the question on the call.

“All I can tell you today is that the new games' dates for both the Olympic and Paralympic Games have been just set up,” Takaya said. “In that respect, Tokyo 2020 and all concerned parties now are doing their very best effort to deliver the games next year."

IOC President Thomas Bach was asked about the possibility of a postponement in an interview published in the German newspaper Die Welt on Sunday.

He did not answer the question directly, but said later that Japanese organizers and Prime Minister Shinzo Abe indicated they “could not manage a postponement beyond next summer at the lastest.”

The Olympics draw 11,000 athletes and 4,400 Paralympic athletes and large support staffs from 206 national Olympic committees.

There are also questions about frozen travel, rebooking hotels, cramming fans into stadiums and arenas, securing venues, and the massive costs of rescheduling, which is estimated in Japan at $2 billion-$6 billion.

Tokyo 2020 CEO Toshiro Muto addressed the issue in a news conference on Friday. He is likely to be asked about it again on Thursday when local organizers and the IOC hold a teleconferene with media in Japan.

The other major question is the cost of the delay; how much will it be, and who pays?

Bach said in the Sunday interview that the IOC would incur “several hundred million dollars” in added costs. Under the so-called Host City Agreement, Japan is liable for the vast majority of the expenses.

“This is impossible to say for now,”Takaya, the spokesman said. “It is not very easy to estimate the exact amount of the games' additional costs, which have been impacted by the postponement."

Tokyo says it's spending $12.6 billion to organize the Olympics. But a Japanese government audit published last year says the costs are twice that much. Of the total spending, $5.6 billion in private money. The rest is from Japanese governments.