An appeals court in Toronto on Monday upheld a lower court's decision to extradite a Chinese man living in Canada who Japanese police believe may know who murdered three women in a Tokyo suburb in 1995.

A lower court decided last September to extradite the man to Japan on suspicion of illegally acquiring a Japanese passport and leaving the country in 2002.

Japanese police want to question the 42-year-old man, who is originally from Fujian province, believing he may know who committed the murders during a robbery at a supermarket in the city of Hachioji, according to Japanese investigative sources.