%0 Journal Article %T Supersymmetric Tuned Inflation %A Izawa %A K. -I. %A Shinbara %A Y. %J High Energy Physics - Phenomenology %D 2007 %I %X We address an issue what kind of tuning realizes a flat potential for inflaton in supergravity. We restrict ourselves to the case that inflationary dynamics is not affected by separate supersymmetry-breaking effects, and consider examples of a single chiral superfield as an inflaton with its vacuum of the vanishing cosmological constant. The examples potentially include the cases of Polonyi field or right-handed sneutrino as an inflaton. %U http://arxiv.org/abs/0710.1141