Takashi Nakatsukasa (U. Tsukuba) Requantization of TDDFT on collective subspace In nuclear physics, the linearized TDDFT often fails to reproduce properties of low-energy modes of excitation. They are basically collective modes of a large amplitude nature, and the failure is due to missing correlations associated with these low-energy collective motions. The microscopic unified description of nuclear structure and reaction is also a big challenge for us. In order to achieve these goals, we adopt a method to "requantize" the TDDFT on a selected collective subspace. In this presentation, I present a basic idea of the methodology, then, show some recent applications, including low-energy nuclear reactions of element synthesis in giant stars.