In pictures: Hokkaido earthquake

1 of 6 More than 300 people were injured when a powerful quake hit northern Japan in the early hours of Friday

2 of 6 Fishermen were also affected by small tsunami, triggered by the quake

3 of 6 The powerful initial quake was followed by a series of smaller aftershocks

4 of 6 Broken glass and falling objects caused most of the injuries

5 of 6 Kushiro airport in eastern Hokkaido had to be closed after part of the ceiling fell in

6 of 6 The quake did not do as much damage as it could have done, because its centre was far out to sea