What country spent more than $12 billion to host an international sporting event this summer that has been postponed due to concerns about coronavirus?

It is Japan.

Explanation:

The 2020 Summer Olympics were scheduled to start next July in Tokyo. But due to the coronavirus pandemic and the significative public health risks to the athletes and to Japanese and foreign spectators alike , the Japanese government announced the games had been postponed  for one year. The games were rescheduled for 2021.

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