「日本は男女平等目指して最も努力すべき国の１つだ」って英語でなんて言うの？

Japan needs to strive more for gender equality. - To strive for means to go after something,
and to work hard to achieve it. This statement is meaning that Japan should work harder
to achieve gender equality.

Gender equality should become more of a priority in Japan. - A priority is implying that
gender equality should be more highly valued.

Japan needs more gender equality

You may explain that something could improve or make a positive change by suggesting an idea or way of progressing using 'needs.'
"Paul needs to improve his behaviour in class or he will get more detentions."
Inroads - direct and noticeable effects on something:
"Women have made major inroads into this profession over the last 20 years."

1. Japan needs to focus on improving gender equality.
   To focus on something means to make it the center of attention. if Japan focuses on gender equality
   it means that it makes gender equality the center of its attention.

   2. Japan needs to pay more attention to gender equality.
      The word attention means to be mindful, to pay notice to something. Therefore this statement is
      saying that Japan needs to be more mindful of and take notice of its gender equality.

1. By saying 'more focus', it means it should gender equality needs more consideration, it should be more of a priority for the government/country. This sentence means that the topic of gender equality is put to the side.

   2. 'work harder towards', means there needs to be a group effort to work harder on getting gender equality to happen. To put more energy into it and hopefully achieve the goal.

▪ Japan's target should be to reach gender equality.
"target" is a result of which efforts are directed to.
This sentence is indicating that gender equality should be made the target in Japan.

▪ The one thing that needs to be under the spotlight in Japan is gender equality.
"under the Spotlight" is to have the direct attention of something.
This sentence is saying that the attention of Japan should be focused on gender equality.

This expression is telling the person you are talking to that there is an ongoing problem (gender equality) and that its being ignored and needs more attention. You would use this statement if you are in agreeance that it is an ongoing issue and it doesn’t have the attention that it deserves.

Gender equality means to have the same rights and opportunities whether you are a man or a woman
We call being a man or woman your gender and equal means to be the same
If you try to do something more we say 'to work harder' or to 'prioritise' something