  The notion of primitive chaos was proposed [J. Phys. Soc. Jpn. {\bf 79},
15002 (2010)] as a notion closely related to the fundamental problems of
physics itself such as determinism, causality, free will, predictability, and
irreversibility. In this letter, we introduce the notion of bird's-eye view
into the primitive chaos, and we find a new hierarchic structure of the
primitive chaos. This means that if we find a chaos in a real phenomenon or a
computer simulation, behind it, we can clearly realize the possibility of
tremendous varieties of chaos in the hierarchic structure unless we can see
them visually.
