On the evening of the sixth, a lady in her 40s was stabbed with a knife in Nerima Ward, Tokyo, and was critically injured, and the Metropolitan Police Department was investigating the whereabouts of a person who fled the scene. A person has been arrested on suspicion of tried homicide. The two are believed to have recognized one another, and the Metropolitan Police Department is investigating the main points.
Source
Woman stabbed in Nerima, critically injured Fleeing man arrested on suspicion of tried homicide | NHK
