1868    Shogunate rebels found Ezo Republic in Hokkaidō.

1976    Cold War: Soviet air force pilot Lt. Viktor Belenko lands a MiG-25 jet fighter at Hakodate on the island of Hokkaidō in Japan and requests political asylum in the United States.

1983    The pilot shaft of the Seikan Tunnel, the world's longest sub-aqueous tunnel (53.85 km) between the Japanese islands of Honshū and Hokkaidō, breaks through.

2003    A magnitude-8.0 earthquake strikes just offshore Hokkaidō, Japan.