The Tokyo metropolitan government on Friday reopened all of Yoyogi Park, 57 days after dengue-carrying mosquitoes were found there.
Parts of the park had been off limits to the public as health workers sprayed pesticide to try to kill off the insect colony.
Officials said that with the onset of autumn, mosquitoes could not survive in the cold weather.
Dengue fever was stamped out in Japan at the end of World War II, even though its mosquito host remains endemic.
The first visitor on Friday morning at 9 a.m. when the park reopened, was a 71-year-old man walking his dog.© Japan Today/AFP