The Korea Research Institute for Vocational Education and Training on Monday said it surveyed 3,000 workers in 15 industries, and almost one-third said they had suffered sexual harassment.

One-quarter of male workers have suffered some sort of sexual harassment at least once a week over the last six months, a study suggests.

The rate stood at 34.4 percent for women and, more surprisingly, 25 percent for men.

The figures for male workers include lewd jokes, being shown pornography, lewd phone calls or text messages, and being asked sexually suggestive questions about their relationships with their wives or girlfriends.

The common culprits were other men in the office, especially superiors. They were executives (34.6 percent), immediate superiors (28.4 percent), and senior workers (14.8 percent).

An institute spokesman said, "We need to spread awareness that both male and female workers are victims of sexual harassment and put more effort into helping victims who are afraid of consequences if they report the nuisance."