Toyota Motor Corp.'s Chief Communications Officer Julie Hamp was arrested in Japan on suspicion of violating the country's drug laws, a police spokesman said.

Hamp, 55, was arrested Thursday, the Metropolitan Police Department spokesman said by phone, asking not to be named in accordance with its policy. She is suspected of importing the pain medication oxycodone, another Tokyo police official said.

Toyota is investigating reports of her arrest, spokesman Itsuki Kurosu said by phone. Calls to Hamp's office and mobile phone were unsuccessful.

Toyota made Hamp its first female managing officer in April, after she served as chief of communications for the automaker's North America region. She joined the company in June 2012 from PepsiCo Inc., where she was a senior vice president, and worked previously for General Motors Corp.

Oxycodone is designated as a narcotic in Japan and users need advance permission from the health and welfare ministry before bringing it into the country, according to the website of the Narcotics Control Department.

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