Subsequent to the Great East Japan Earthquake , the Japanese government added November 5 ( Tsunami Readiness Day , 津波防災の日 , tsunami bousai no hi ) to the calendar of national awareness days . In 2013 1.33 million people participated in drills in 43 of Japan 's 47 prefectures . In 2014 , about 2.35 million people participated in them , while in 2015 , about 1.6 million people did . In 2015 the Tokyo Metropolitan Government sent a package to households with preparation advice including a manga story
Great East Japan Earthquake
2011 Tōhoku earthquake and tsunami
Disaster Prevention Day