Supersymmetric Unification

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1. We found a new mechanism for dynamical Supersymmetry breaking. And we constructed particle-physics models based on such a new mechanism.2. We constructed various inflation models in supergravity and discussed the primordial black-hole formation in early universe.3. We investigated cosmological consequence of dilation presents in some string theories and pointed out a possibility that thee dilation is the dark matter in our universe.4. We found a particle-physics model which naturally explains the large neatrino mixing observed by super kamicbande experiments.5z We constructed a particle-physics model for the superheavy particle introduced to explain the ultra-high energy cosmic rays.