<p>Gender disparities in academia persist worldwide, yet empirical evidence remains limited on where, at which stages, and to what extent women exit academic careers. Using a uniquely comprehensive, decade-long national dataset from Japan (2014–2023), this study provides system-level evidence of gendered attrition across six disciplinary fields and four academic ranks. By distinguishing among the potential pool, applicant pool, and hiring outcomes, the analysis separates application-stage processes from hiring-stage outcomes—an analytical distinction rarely possible in other national contexts due to data limitations. The findings indicate that the application stage constitutes the primary bottleneck in women’s academic careers. Across fields, women’s underrepresentation appears to be driven less by disadvantage at the point of selection than by the fact that many qualified women do not apply for academic positions. Once applications are submitted, hiring outcomes are generally neutral or, in some cases, favorable to women, with lecturer-level recruitment showing evidence of proactive intervention. Rank-level analyses further indicate that women’s attrition is pronounced at career entry and continues at mid- and senior-career stages in most fields. Field-level analyses highlight substantial heterogeneity in how and when attrition occurs. By separating application-stage attrition from hiring outcomes and examining patterns across ranks and disciplines, this study refines existing accounts of gender inequality in academia. The results highlight the importance of organizational and structural factors shaping application behavior and cumulative disadvantage, and underscore the policy relevance of collecting detailed applicant-flow data. Overall, the findings suggest that stage-specific and discipline-sensitive interventions are essential for addressing persistent gendered disparities in academia.</p>