There was a M6.7 quake in Hokkaido this morning which has caused a large landslide, widespread destruction, and some death. Geologists are saying that it was caused by the Ishikari Fault - an area called the Ishikari Lowland (石狩低地; see image - the epicenter, Ishikari City, is shown by a star), which is where the eastern side of Hokkaido is sliding under the western side. The geology is apparently similar to that in Mashiki.
Our thoughts go out to our Hokkaido friends. We hope that this is not a foreshock. Off of the east coast of Hokkaido is the Chishima Trench, which has potential for an earthquake the size of that which struck Tohoku. This link provides an English-language article regarding that. - William