I'm a theorist working on particle physics and cosmology. I'm interested in physics beyond the Standard Model(SM), mainly motivated by the solution to the hierarchy problem in the SM. Supersymmetric models (including supergravity) and scale invariant models are such examples. I'm also working on the early universe and cosmology. Inflation models and their consistency are such examples, in particular, Higgs inflation, unitarity problem and new physics. Dark matter models are a recent addition to the topic. I have suggested collider searches for dark matter in the mediator models and have also led model building and dynamics of a new species of dark matter, so called Strongly Interacting Massive Particles (SIMPs). I'm open-minded to new ideas for theoretical particle physics and cosmology. I'm expecting to develop lots of new ideas in light of new data in the LHC and Planck era.