Investigative sources say Japanese actress Erika Sawajiri told police how she obtained the drug that led to her arrest.
The actress told investigators she got the substance at an event several weeks ago. Sawajiri was arrested on Saturday on suspicion of possessing the synthetic drug MDMA at her apartment in Tokyo.
The sources say she told police that she had been taking MDMA and other illegal drugs -- marijuana, LSD and cocaine -- for more than 10 years.
Police are looking into the details of how Sawajiri got ahold of the MDMA.