(事前公開アブストラクト) In this research, we discuss indoor localization using dimmable lightings. With increasing demands for energy saving in commercial buildings and offices, computer-dimmable lightings are being introduced to them.We propose indoor localization using computer-dimmable lightings, which use 5 staged illuminance pattern that cause a difference of illuminance in each point. However, proposed method has poor estimation precision at the corners of the room. The reason is that our prerequisites require that the sensors obtain illuminance based on incident light from all directions. Therefore, we present corner correction scheme to improve estimation accuracy in corner of room. This research also involves evaluating positioning accurate rates to verify the corner correction scheme's efficient.The experimental result indicates that the correction scheme allows us to improve the position estimation accuracy at the corner.