I'm about as pro-nuclear as they get, but the Wikipedia articles seem to support a story of the Japanese government shutting down nuclear and being very tentative restarting the existing reactors [0].
It is difficult to guess what is going on in a country that doesn't report in English, but the info in Wikipedia (mostly a little dated) seems to support a rollback of nuclear. Reduced generation, limited new developments. Either they are using less energy or something else is filling the void left by nuclear plant shutdowns.
[0] https://en.wikipedia.org/wiki/Nuclear_power_in_Japan#Nuclear...