Japanese police Saturday
a 46-year-old man for the murder of a Vietnamese woman in 2006, Japan's Kyodo News reported.
The newswire quoted investigators as saying Akihiro Goto has admitted to killing Le Thi Ly, a 25-year-old Vietnamese guest worker, at her house in Toyokawa City of Aichi Prefecture.
He has not revealed the motive for the murder, the police said, adding further investigations were needed.
Ly was found dead on July 29, 2006. An autopsy revealed multiple stab-wounds like injuries on her body, but there were no signs of rape or struggle, and her room was undisturbed.
Ly, a native of the central province of Thanh Hoa, was sent to Japan by Ho Chi Minh City-based Overseas Manpower Service Company (Suleco) in 2001.
According to Kyodo News, Goto is also suspected of killing a 44-year-old woman whose body was found in a mountainous forest area in Gero City of Gifu Prefecture last April.
No further information was made available about the victim, including her nationality.