Keio Electric Railway Co. trains will begin providing women-only carriages on late night runs in late March following an overwhelmingly positive response to a trial service in December, company officials said Thursday.

The private railway operator said the last car on eight express trains leaving Shinjuku Station after 11 p.m. will be limited to female passengers beginning March 27. The move is in response to the increasing frequency of sexual harassment against female passengers.

While there have been several cases of carriages being designated specifically for women and children in Japan, providing women-only cars on this scale is unprecedented.