Nichiren on the cause of the Three Calamities and Seven Disasters

“....because this era is ‘firm in struggle and the Pure Dharma is hidden and sinks’ [Daijikkyo 55 (“Embudai hon”) (T.13.363)], and, on top of this, there are only evil countries, evil kings, evil ministers, evil commoners and they turn against the True Dharma and revere perverted dharmas and perverted teachers, so evil demons enter into the land and the Three Calamities and the Seven Disasters have arisen in abundance.” (STN, v. 1, 735)