March 11, 2021 will be the 10th year anniversary of the mega-tsunami and earthquake which rocked Japan's eastern coast in 2011, and claimed more than 20,000 lives. In this two-part special, NHK commemorates that day with a chronological timeline of the events that occurred using footage filmed at the center of the disaster. The program contains viewer warnings that appear prior to footage showing danger or devastation that some may find disturbing (no deaths are shown).