[horatio]

Murder and robbery rate are also far lower. Of course premodern cultural elements might have a far larger effect upon crime in Japan than actual laws so the gun law comparison might be dubious.
In my own country firearms are not as easy to get as in the US but there is a moderate gun culture and interestingly the gun victim rate as well as the general murder rate are between those of the US and Japan. So taking another country into account it is safe to claim that there is a positive correlation between tight gun laws and security.