At 8:00 a.m., Koji Nagahama, a 41-year-old member of the Matsuba-kai organized crime group, surrendered to officers at the Chuo Police Station. The suspect, whose photo and description was released to the public on Monday, was taken into custody on murder and assault charges.
On January 18 at 10:30 p.m., the gang member is alleged to have entered Club Happiness, located in the Amakubo area, and stabbed Koji Ueno three times with a 20-centimeter kitchen knife. The victim, 42, who was seated in a lounge seat, suffered wounds to his chest. He was confirmed dead at a local hospital the following morning.
Ueno entered Club Happiness by himself at around 10:00 p.m. At the time, there were five or six groups of customers and several employees.
About 30 minutes before the incident, an eyewitness observed the victim arguing with the alleged attacker in front of another establishment.
