In the park blamed for Japan's dengue fever outbreak
2 September 2014 Last updated at 12:44 BST
Japan is battling its first outbreak of dengue fever in almost 70 years, with at least 22 people confirmed as being infected.
The health ministry said the patients were believed to have contracted the virus from a mosquito in Tokyo's popular Yoyogi Park.
Rupert Wingfield-Hayes reports from the park on how the virus is spread.