Prefectural Earthquake Disaster Prevention Day is observed in Gifu, Japan, every October 28. This day commemorates the victims of the Mino–Owari earthquake, which occurred on the same date in 1891 and is recognized as one of the most significant earthquakes in Japanese history. The earthquake, with a surface wave magnitude of 8, resulted in over 7,000 fatalities and extensive destruction, particularly in the cities of Gifu and Ogaki. The observance aims to honor the memory of those affected and emphasizes the importance of seismological research and preparedness for natural disasters. This day is part of a broader context of disaster awareness in Japan, which also includes nationwide observances like Disaster Prevention Day on September 1.