Kazuo Shimamura, 43, a member of the Yamaguchi-gumi, allegedly sold the fake item to a 38-year-old Tokyo woman last October for 9,500 yen.
According to investigators, a genuine version of the necklace retails for 23,000 yen. She later determined it was counterfeit.
Shimamura has reportedly denied the allegations. “I received it from a friend and then sold it on the Internet. I thought it was real,” the suspect is quoted by police.
Investigators are currently examining whether Shimamura has sold other fake items in the past.
