Japanese employers publish the share of managers who are women because a 2015 statute requires them to. The data on this site exists because of that duty — and its limits are the limits of the duty.
This page explains the rules. For the numbers — the published ratios — see the benchmark page.
Employers above a size threshold must analyse their own position, set numerical targets in an action plan, and publish selected metrics. The threshold was 301 or more employees when the Act took effect, and was extended to 101 or more from April 2022.
Separately, employers with 301 or more employees have had to publish the gender pay gap since July 2022. Listed companies also carry the ratio, the pay gap and the male parental leave rate in their annual securities report for fiscal years ending on or after 31 March 2023.
Nothing standardises where management begins. Some employers count from section chief (kacho) upward; others include the assistant manager grade below it. A company that counts more grades as management will report a higher ratio without any difference in who actually decides anything.
Do not compare two companies a point at a time. The ratio is useful for spotting the difference between 3% and 30%, and for tracking one employer over time — not for ranking near-neighbours.
Two structural features do most of the work. Many employers historically split intake into a career track and a clerical track, with women concentrated in the latter and promotion effectively unavailable from it. And promotion has been tied to continuous long service, which career interruption around childbirth breaks.
That is also why the ratio and the pay gap do not move together as tightly as expected: the gap is driven substantially by grade and tenure composition, not only by how many women hold management titles.
Bonuses ・ Retirement lump sums ・ Graduate hiring ・ Paid leave ・ Overtime ・ Parental leave ・ Women in management ・ Reading salary figures ・ Contracts and dismissal ・ Annual securities reports ・ all guides.
Sources: Act on the Promotion of Women's Participation and Advancement in the Workplace (Act No. 64 of 2015) / Financial Instruments and Exchange Act (Act No. 25 of 1948). Summarised by Corpus; not provided or endorsed by any government agency. The figures behind the linked benchmark pages come from Japanese government statistics and company disclosure — see all benchmarks.