日本警方逮捕了一名持刀伤人的女子，造成4人受伤

Police in Tokyo arrested a woman who injured 4 passengers inside a train in Akihabara using a knife. The woman was detained at Akihabara station. This violent incident was rare in Japan, and there was growing concern about homemade guns and explosives.

小编点评

The incident in which a woman attacked passengers on a train in Akihabara with a knife was very disturbing. This type of violence is rare in Japan and it has sparked concern about public safety.