Trying to find a recent film title about a lost movie made in Japan

I’m trying to find the title of a movie I saw a few scenes from recently and for the life of me can not find it again.

The movie started in a boardroom in Japan where a film maker was discussing a new movie he wanted to do. Everyone in the board room seemed to be against the idea of the new movie, however he made it anyway.

After release the movie resulted in the film maker being bankrupt and losing everything. The film he made ended up archived in a warehouse which then caught fire.

It then moves to America where a teenager gets hold of possibly the last remaining copy of this film. I cant recall what it was but something about a fight and “with rainbows” at the end

naked director?