Tokyo - A Japanese woman has been arrested for allegedly running brothels for the elderly which included female staff in their 70s, police and a broadcaster said on Tuesday.
Risako Yokota, 53, was arrested last week for allegedly violating an anti-prostitution law in Tokyo, a police spokesman said.
Broadcaster NTV said 10 women aged in their 40s to 70s were working in one of Yokota's brothels, whose main clientele were men and women drawing a pension.
Yokota reportedly made about 50 million yen ($530 000) over two years, the broadcaster said.
More than 20 percent of Japan's population is aged 65 or over, one of the world's highest proportions of elderly people.
Dutch twins Louise and Martine Fokkens made headlines around the world last year when they were revealed as Amsterdam's oldest working twin prostitutes, aged 70.