On August 9, one of the darkest days in Japanese history, the nation collectively takes a moment of silence to remember those lost in the harrowing event known colloquially as the 'day at the sea of blood'. Each year, this devastating event sparks a nationwide discussion about past tragedies and the repercussions that still resonate today. The day is marked with various memorial activities and public outpourings of grief across the country.

In Japan, collective memory of past tragedies is an important part of their social and cultural discourse. This helps the older and younger generations come together and ensures these historical events are never forgotten, maintaining a deep sense of national respect and unity in the country.

In the United States or European Union, there are similar days of nationwide mourning for tragedies, such as Memorial Day in the U.S or Armistice Day in many European nations. In these countries too, collective memory of national tragedies reinforces a sense of unity among citizens, just as it does in Japan.