At around 6:10 p.m., Takahiro Miura allegedly used a knife to stab his wife in the chest. After Miura alerted police by telephone about 30 minutes later, officers arriving at the scene found the woman collapsed and bleeding inside a room of the residence.
After being transported to a hospital, the woman was confirmed dead, police said.
Miura, who has been accused of attempted murder, admits to the allegations.
Police are now investigating the motive for the crime while assessing whether to change the charges against the suspect to murder.
