How often are earthquakes in japan?

Earthquakes will often occur in Japan once every few days, give or take. This is because Japan is located on four tectonic plates, which are constantly moving and grinding together. This tectonic activity is also responsible for Japan's mountain ranges and active volcanos.

The vast majority of quakes in Japan are minor and do not cause much damage if any at all. This is due to the fact that Japan's modern structures are built to withstand earthquakes to a certain scale. However, because of its high amount of tectonic activity, Japan is more prone to get major, destructive earthquakes than most other nations; most notably the Great Kanto Earthquake (in 1923), the 6.9 magnitude Kobe earthquake in 1995, and most recently the 8.9 magnitude quake that struck on 11th March 2011.