The suspect assassins former Prime Minister Abe only need one or two days to make guns from available materials, according to experts.

Anyone in the world can learn how to make guns with 3D printers via the Internet.

The assassination shows that gun violence cannot be completely excluded, even in a country with strict control laws like Japan.

The gun was used by the suspect Yamagami to shoot Mr. Abe on July 8.

The scene image shows the suspect Tetsuya Yamagami shot Mr. Abe with a homemade gun with two steel pipes covered with black tape and the handle like a pistol.

Based on the image at the scene, weapons experts said that this homemade gun seemed to use the fire mechanism by electric stork.

Conventional ammunition uses a needle activation mechanism that is difficult to buy in Japan.

The suspect claimed that he sought to build guns on the internet, as well as ordering the details and gunpowder online.

Japan is one of the countries that maintain the world's most stringent gun control law.

To get a gun use license is a long and complicated process, even for Japanese citizens.

Japan applies strict licensing process and severe punishment for illegal storage and use of guns, but it does not completely prevent the shooting.

The Japanese police deployed an elite officer to protect the former Prime Minister Abe, but a series of mistakes made them unable to stop the assassin.