A 27-year-old man was arrested late Thursday in Mishima, Shizuoka Prefecture, on suspicion of fatally stabbing a total stranger with a knife, police said.
The suspect, Mishima resident Yuki Hanami, was quoted by investigators as saying, "I wanted to test my guts by killing someone," according to an NHK report.
The victim, Kenji Masuyama, 53, was a company president in Mishima. He was stabbed in abdomen on a street in the city at around midnight Thursday while on his way home, the police said. He was rushed to a hospital but later died from blood loss.
Before being taken to the hospital, Masuyama called for an ambulance and said, "I've been stabbed by a total stranger."
Hanami turned himself in shortly after the incident and brought two knives with him. Another two knives were found near the murder scene, the police said.
The murder took place in an area of shops and residences some 300 meters southwest of Mishima Station.