Per Yahoo! Japan, a 6.3-magnitude earthquake shook Northern Japan at 12:30 p.m. local time on Friday. The epicenter was in Tokachi-oki and the quake was felt strongly in nearby Hokkaido and Sapporo, Japan. Per the map provided by Yahoo, it does not appear Tokyo felt the quake.
@Kuma provided the first tweet on the quake. It was soon followed by these tweets from the affected area:
was “No problems in Sapporo.. just some minor rumbling.” @nobonne of Sapporo reported feeling “dizzy” after the quake.