Police have arrested a former president of talent agency Marks Japan and two other people after a young woman said she was raped repeatedly on camera for adult videos and threatened with financial penalties if she refused this "contractual" obligation.

Investigative sources said Sunday the people were arrested a day earlier on suspicion of dispatching the woman in her 20s to work with a video producer over two consecutive days in late 2013 during which she was coerced into engaging in a sex act, they said.

The initial work earned ¥250,000, and it became a cycle from which the victim was unable to escape, as staff allegedly threatened to reveal it to her family if she refused to continue.