Japan is experiencing a surge in hand, foot and mouth disease (HFMD) cases, surpassing the national alert threshold for the first time in two years. This increase coincides with the arrival of summer, a period typically associated with higher HFMD incidence. The outbreak is prompting public health officials to monitor the situation closely and prepare for further spread. While generally mild, HFMD is highly contagious and primarily affects young children. Symptoms include fever, mouth sores, and a rash on the hands and feet. Authorities are advising preventative measures like frequent handwashing and disinfection to curb transmission. The rapid rise in cases signals a potential challenge for healthcare systems as the summer progresses.