Hand Foot and Mouth Disease Cases Rise Above Warning Level in 27 Prefectures

Cases of hand, foot and mouth disease exceeded the government warning threshold in 27 prefectures during the week of June 29 through July 5, 2026, Japan Times reported. The national average reached 7.03 patients per medical institution, more than 1.5 times the prior week and above the five-patient threshold for the first time in two years.

About 2,000 designated pediatric medical institutions reported 15,845 patients in that week, according to the Japan Institute for Health Security.

Shimane Prefecture recorded the highest rate at 18 patients per institution. Saga followed at 11.83, Tokyo at 11.72, Chiba at 11.59, Toyama at 10.69 and Nara at 10.09. The viral infection mainly affects infants and young children and produces blister-like rashes in the mouth and on the hands and feet.

It spreads through respiratory droplets, direct contact and the fecal-oral route. Authorities recommend frequent handwashing with soap and water, especially after diaper changes, and avoiding shared towels. Most patients recover within three to seven days with mild fever.

About half of cases occur in children younger than 2, though older children and adults can also be affected. No vaccine or preventive medication exists.