From a sarin attack on a city subway to the rebirth of Buddha to protest marches against indecent magazines, Japan's religious movements have covered a lot of ground.
Novichok are a set of molecules that are some of the most deadly nerve agents ever developed. They are almost impossible to detect and clean up.
The 1995 Tokyo sarin attack helped make Japanese criminal justice dramatically more punitive.
Nerve agents were discovered by accident in the 1930s.
Using nerve agents is banned under the Chemical Weapons Convention, but North Korea is not a party to it.