Fundamental basis of Japanese culture is indigenous nature worship as well as Buddhism imported from India via China. From ancient times, Japanese accepted various “gods” reigning over universe without notion of one God.

After the war, what captured the heart of children were robot animation like Gandam or Evangelion. Japanese children like robot heroes very much as a symbol of justice, so to speak, virtue rewarded, vice punished.
His works are embodiments of a metaphor expressing modern Japan and old and new Japanese cultures.

For example, the “face” represented by real animal bones is an evidence of his pursuit on the subject of what means Japanese.