A 22-year-old man charged with murdering two sisters and torching their dwelling pleaded guilty Monday, saying he has no plan to contest the charges by prosecutors, who claim he killed for pleasure.

Yukio Yamaji, unemployed with no fixed address, told his first trial session at the Osaka District Court, "The facts read (by prosecutors) are correct."

According to the prosecutors, Yamaji, who in 2000 murdered his mother, broke into a condominium in Naniwa Ward, Osaka, in the early hours of Nov. 17 and fatally stabbed Asuka Uehara, 27, and Chihiro Uehara, 19.