These are just some thoughts that could help. Or not.
(1) Japan certainly has poverty but I don't know how it compares to other G20 nations. Certainly far less than U.S.
(2) People do go hungry in Japan but there is also some social/safety net so my feeling is that when people go hungry - or even die from poverty/hunger - it's usually because they don't seek out assistance. I don't think there's a very strong support from the NGO side. I've never heard of a charitable food bank in Japan for example but it probably exists.
(3) The relatively high average life span of Japanese would indicate overall good health and well-being. On the other hand, the relatively high rate of suicide would indicate otherwise.
(4) I don't know how they are compared to other countries.
(5) Very poor compared to EU I would guess. Still traditional gender roles are very much expected and there's little to no support for single mothers, limited childcare to support working mothers, men are still expected to dedicate their lives to career/company. Gender inequality is still very much systemic. Here's one
example.
(6) Not sure but I would guess they are on par with EU.
(7) Not sure how they compare. As far as I know they don't have any clean energy except for nuclear.
(8) Economically Japan has been relatively stagnant for decades now.
(9) No idea.
(10) Japan is relatively egalitarian. You don't see huge disparities in wealth or living circumstances like we have in the U.S. I have not heard of any efforts to reduce inequality further. Immigrants and non-Japanese are not really on their radar at all though.
(11) it's a big topic of discussion with some large corporate backers. So maybe they are more serious about it than some other places (see
Woven City).
(12) Not sure how they compare.
(13) I haven't seen a lot of focus on this. Maybe they think they are already doing well.
(14) (15) (16) (17) no idea