Interaction system with mid-air CG character that has own eyes. - Kei Tsuchiya; Ayaka Sano; Naoya Koizumi (SIGGRAPH ASIA Posters, 2018)

Levitar: Real Space Interaction through Mid-Air CG Avatar. - Kei Tsuchiya; Naoya Koizumi (SIGGRAPH ASIA Emerging Technologies, 2019)

An Optical Design for Avatar-User Co-axial Viewpoint Telepresence. - Kei Tsuchiya; Naoya Koizumi (VR, 2020)

Aerial Imaging by Retro-Reflection for Mid-Air Image Display and Camera Viewpoint Transfer. - Kei Tsuchiya; Naoya Koizumi (IEEE Access, 2021)