On the night of the 28th, a 24-year-old woman was stabbed to death by a man with a knife in Setagaya Ward, Tokyo, and the woman had consulted with the Metropolitan Police Department about the arrested suspect before the incident, saying that she wanted to break up with him, but he contacted her repeatedly, and that he had been assaulted. The Metropolitan Police Department had verbally warned the suspect to stop acting.

On the night of the 28th, Nanami Kojima (24), a resident of a condominium in Daita, Setagaya-ku, Tokyo, was stabbed in the chest and abdomen with a knife and died at the hospital where she was taken.

The Metropolitan Police Department arrested the suspect Wang Lei (29), a Chinese national, who was near the scene with an unknown address and occupation, on suspicion of attempted murder because he admitted to stabbing him with a knife, and is investigating the details of the circumstances.

In this case, it was found in an interview with the Metropolitan Police Department that Mr. Kojima had been consulting with the Metropolitan Police Department about the suspect since July, saying that he wanted to break up with him but was repeatedly contacted and that he had been assaulted.

The Metropolitan Police Department met with the suspect and verbally warned him that such behavior may violate the anti-stalking law and the criminal law, and he was in regular contact with Mr. Kojima to confirm his safety.

The Metropolitan Police Department says it will "confirm whether the response was appropriate."