I think that this is a coincidence. Japan has low partisanship for environmentalism and has less nuclear power than most developed countries (along with low overall partisanship). The association would be between three things: (1) low partisanship for environmentalism, (2) high overall partisanship, and (3) lots of nuclear power plants. There aren’t enough countries to do this kind of correlation.
I think that this is a coincidence. Japan has low partisanship for environmentalism and has less nuclear power than most developed countries (along with low overall partisanship). The association would be between three things: (1) low partisanship for environmentalism, (2) high overall partisanship, and (3) lots of nuclear power plants. There aren’t enough countries to do this kind of correlation.