This study examined the relationships between intakes of soy, fat and dietary fibre and the severity of menstrual pain in a cross-sectional study. A total of 276 Japanese women participated. Intakes of nutrients and foods, including soy products, isoflavones, fats and dietary fibre, were estimated by a validated semiquantitative food frequency questionnaire. Severity of menstrual pain was assessed by the multidimensional scoring system. Intake of dietary fibre was significantly inversely correlated with menstrual pain, but neither soy nor fat intake was.