This study quantifies the effectiveness of the leadership development program (LDP) in women's colleges presented by Iwaki et al. (2021), namely that leadership is to influence others to produce results, is acquired, and can be exercised and developed by anyone. In the model, the transformation in the 'motivation' aspect leads to the 'behavior', and therefore the transformation of making an improvement plan based on previous results, and implementing the plan by considering good points and areas of improvement based on the advice of others. As a methodology, a questionnaire survey was used to investigate the change in consciousness and behavior before and after the LDP was promoted at a women's university. As a result, the change in consciousness related to the items emphasized in this leadership development, such as goal confirmation and leadership awareness, leads to this behavior. This change in the positive direction of behavior can be thought of as revealing sufficient conditions for leadership behavior (and the change in consciousness that leads to it), indicating how it can be better achieved when practicing leadership behavior. Achieving both necessary and sufficient conditions to prevent and respond to negative changes while extending positive changes is required in leadership development programs.