Regarding specific countries listed in https://en.wikipedia.org/wiki/List_of_countries_by_intentional_homicide_rate , the intentional homicides per 100,000 people were:
0.31 Japan
0.66 Spain
0.82 Taiwan
1.05 Morocco
4.88 United States
7.16 Peru
Regarding terrorist attacks, there were terrorist attacks in Japan in 1994 and 1995 using poison gas (sarin). The more recent one in the Tokyo subway killed 12 and injured 5,000.