Young Japanese men are growing indifferent or even averse to sex, while married couples are starting to have it even less, a recent government survey says.

According to the results of the September poll, released Wednesday, over a third of men aged 16 to 19 had no interest in sex, double the figure from 2008, and over 40 percent of those married have been sexless for at least the past month.

The research was organized by the Health, Labor and Welfare Ministry as part of its study on preventing unwanted pregnancies.