This study examines the influence of learning in a female teacher homeroom class in elementary school on pupils' voting behavior later in life, using independently collected individual-level data. Further, we evaluate its effect on preference for women's participation in the workplace in adulthood. Our study found that having a female teacher in the first year of school makes individuals more likely to vote for female candidates, and to prefer policy for female labor participation in adulthood. However, the effect is only observed among males, and not female pupils. These findings offer new evidence for the female socialization hypothesis.