  We formulate a fully microscopic approach to large-scale nuclear dynamics
using a hyperradius as a collective coordinate. An adiabatic potential is
defined by taking account of all possible configurations at a fixed
hyperradius, and its hyperradius dependence plays a key role in governing the
global nuclear motion. In order to go to larger systems beyond few-body
systems, we suggest basis functions of a microscopic multicluster model,
propose a method for calculating matrix elements of an adiabatic Hamiltonian
with use of Fourier transforms, and test its effectiveness.
