One of my primary reseach focuses is on the early universe, explored through polarization observation experiments of the cosmic microwave background (CMB). Since 2008, I have been a member of the LiteBIRD team, where I concentrate on linking instrument performances with scientific output, particularly from the perspective of systematic effects in the design of satellite observation instruments. Additionally, I am developing a uniquely designed superconducting detector, with the goal of applying it to astroparticle physics.