He stabbed 10 people because he wanted to kill "happy women."

 Japan.. He stabbed 10 people because he wanted to kill "happy women."

"Happiness" seems to anger some people to the point where they may commit murder, as happened with a Japanese man on a tokyo passenger train on Friday.

Japanese media reported Saturday that police arrested a 36-year-old man who attacked several people on a passenger train and stabbed several passengers.

Japanese media reported that the man who allegedly injured 10 people in a knife attack on a Tokyo commuter train late Friday evening told police that he was outraged when he saw women who "looked happy" and wanted to kill them.

Police arrested the man in another area of Tokyo after he stabbed people in the attack, which took place at around 8:40 p.m. local time on Friday, on a train on the Odakyo line in the western part of the city, media said.

One of the victims, a university student, was seriously injured, while the rest sustained less serious injuries.

 "I started feeling like I wanted to kill women who looked happy about six years ago," the sankei newspaper reported. Anyone who looked fine, I just wanted to kill a lot of people," Reuters reported.

Other media outlets, including Japan's Radio and Television Corporation, published similar statements about the suspect.

Violent crime is rare in Japan, but there have been a series of knife attacks by unknown assailants of the victims.

In June 2008, a man entered a light truck in a crowd in the popular Akihabara area, jumped out of the car and began stabbing passers-by, killing seven people.