We investigated perinatal outcomes in pregnant Japanese women who habitually consumed alcohol during pregnancies managed at our hospital. Of the 4,791 Japanese women with singleton deliveries at ≥22 weeks' gestation, 44 (0.9%) were found to have habitually consumed alcohol during pregnancy. Multiple logistic regression analyses suggested that habitual alcohol consumption during pregnancy was not associated with adverse perinatal outcomes. However, 64% of the women who habitually consumed alcohol during pregnancy also habitually smoked; smoking leads to increased risks of a low birth weight and placental abruption.