Murase K, et al. - Authors attempted to ascertain how the Great East Japan Earthquake and subsequent the Fukushima Daiichi nuclear accident (2011) influenced congenital diseases in order to estimate the change of discharge rate after cryptorchidism surgery between pre- and post-disaster in Japan. A nationwide increase was noted in the discharge rate of cryptorchidism. Findings illustrated that the rates of low-weight babies or preterm births, risk factors of cryptorchidism, were almost constant during the study period, and age distribution of the surgery was also not changed. This, in turn, indicated that the other factors that correlated with the disaster increased the incidence of cryptorchidism.