Accused serial rapist Joji Obara assaulted nearly all his female victims in his condominium in Zushi, Kanagawa Prefecture, despite having several other metropolitan-area dwellings, police alleged Monday.

A number of videotapes police seized from his properties suggest he raped several hundred women in the condo in Zushi, the sources said. Obara bought the condo in 1982.

Obara, 48, stands accused of seven cases involving the drugging and raping of women. Two of the alleged incidents resulted in the deaths of the women involved, Briton Lucie Blackman and Australian Carita Ridgway, apparently due to drug overdoses.

Police confiscated the tapes during searches of several of his condos and residences in Kanagawa and Tokyo after his arrest in October.

Obara allegedly made the tapes for his own amusement.

In the Zushi condo, police found video recording equipment including lights, as well as many bottles of alcohol laced with drugs.

Prosecutors have indicted Obara on charges relating to six of the seven cases, and hearings for five of them have already begun before the Tokyo District Court.

Obara was served a seventh arrest warrant Friday over Blackman's slaying, accusing him of assault resulting in death. Tokyo police Sunday turned this case over to the Tokyo Public Prosecutor's Office, charging Obara with raping her and causing her death, police officials said.

Prosecutors, who are currently questioning Obara and checking evidence, are expected to decide whether to charge him before April 29.

Blackman's dismembered corpse was found in a seaside cave a few meters from Obara's condominium in Miura, Kanagawa Prefecture. Evidence, including hair samples, mobile phone records and witness accounts placing the two together in Zushi last July 1, the day she was last seen, have implicated him in her death.