In Japan, what forms of religion supplement State Shinto?

What forms of religion supplement State Shinto?

Buddhism and Taoism.

Buddhism is the main one after Shinto
there is a small amount of Taoist and christian too but the Christians are far less annoying than there western counterparts

Shinto is like a little black dress. It goes with anything.

Buddhism, Taoism and, quite honestly? 'Pfft, whatever'-ism.

I live in Okinawa, and to be honest? Most the people here aren't highly religious at all.