Based on the witnesses' descriptions, the police at the time confirmed that the woman thrown into the sea by Ezaki Nagayasu was indeed his wife, Ezaki Kazu.
The police searched the house and found chlorpromazine tablets with Ezaki Nagayasu's saliva in the bedroom.
A common antipsychotic drug at the time.
Ezaki Nagayasu's family had been giving him this sedative medication for a long time according to doctor's orders.
Moreover, there were large bloodstains and drag marks in the bedroom.
It is speculated that during one of his medication sessions, Ezaki Nagayasu pretended to take the nerve-calming chlorpromazine to deceive his caring wife and then attacked when she was not paying attention.
After a long search, the police found Ezaki Nagayasu's drowned body near Wakasa Bay, but they never found Ezaki Kazu.
Her body was probably swept into the depths of the sea.
Some time later, following legal procedures, the police declared Ezaki Kazu dead though her body was never found.
