Japan’s new gender pay gap disclosure rules are set to be strengthened, requiring many Japanese firms to report new information by June next year.

The move may improve diversity in a country that has long trailed behind global counterparts in gender equality.

The difference in wages reflects a more fundamental gap in the amount of decision-making power women have compared to just a lag in titles, points out Ayako Fujita, Japan Chief Economist at JPMorgan Securities Japan.