On March 11, 2011, Japan was hit by a massive earthquake, the Great East Japan Earthquake. In Fukushima Prefecture, 164,865 residents (as of 2012) were forced to flee their homes and evacuate due to the earthquake and tsunami as well as the nuclear power plant accident. The earthquake, tsunami, nuclear accident, and evacuation have taken a heavy toll on the health of the people of Fukushima Prefecture. For example, in a survey using data from 330,000-440,000 people annually for specified health checkups conducted in Japan, the prevalence of people with metabolic syndrome increased from 16.2% in 2010, before the earthquake, to 19.5% in 2012 and 20.4% in 2017, and has not decreased since then. In the background, there is thought to be a worsening of lifestyle habits, and also, cardiovascular diseases are increased. I will introduce these post-disaster health issues in Japan.