“Resilient” is a term meaning being able to return to its original shape flexibly after being bent with a great force applied. The term has recently been referred to the ability of the Japanese government to respond to risks of major natural disasters, such as an expected huge earthquake in central Tokyo and an expected powerful earthquake in the Nankai Trough off central and western Japan, emphasized in its policy of national resilience. It is said to be imperative for Japan to establish a strong and flexible social infrastructure owing to which possible damage from natural disasters can be minimized and the speedy recovery and rehabilitation from such damage is possible.