It really explains why there is more sexism in Japan than some other places in the world, it poisons its culture that it even affects a lot of games, manga, anime, relationships, society, and other things in general.
https://www.japantimes.co.jp/life/2017/01/30/language/womans-lowly-place-japan-mirrored-language/https://www.economist.com/news/asia/21725016-except-perhaps-industry-catering-sexually-frustrated-no-one-well-served-sexismhttps://www.japantimes.co.jp/news/2016/09/27/national/social-issues/amid-charges-sexism-city-kyushu-pulls-video-promoting-local-eels/https://www.quora.com/Are-Japanese-people-sexisthttp://www.bbc.com/news/magazine-21880124https://en.m.wikipedia.org/wiki/Global_Gender_Gap_Reportand in things like manga, anime and games, it can also be seen with how roles are chosen and how characters of either gender are represented and tiered.
just look at games like Mario, Zelda, FFXV, and tons of other games place one gender above the other. and then compare them to games like The Elder Scrolls Skryim, Jade Empire, Playerunknown's Battlegrounds and other games are designed. whether they have a story or not, are single player or multiplayer,
there are more western developers open to gender quality than most Japanese developers.
and a lot of this is due to how Japan perceives women, how japanese males perceive women, and how japanese females are pressured to see themselves.
it's only when some Japanese companies like Game Freak, for example, think outside the box, grow out of their national culture's sexist stigma, and make their products for both males and females, and generally glorify both equally, at least in the games, their anime is still somewhat sexist, but overall, it's an ongoing problem that Japan is having more so than other regions.
like look at even Europe, they have some developers that honor and value both genders equally, and develop their games with both genders in mind.
Exclusively favoring either gender and excluding either gender (in leading role, representation, relevance, respect, and glorification) is bad to the industries, society and bad to their own business and mind as well.