Dr. Kato has served as a Key Research Scientist of AIST and Project Leaders for many National R&D Projects (by Japanese Government), including “Ferroelectric Memories for Next Generation” (1999-2003), “Research and Development of Low-Emission Materials and Technology” (2002-2007), “Environmental-Friendly Sensors” (2006-2010), “Research and Development of Organic Optical Devices Using Self-Adaption Technology” (2006-2007), “Research and Development of Organic Optical Tape Modules Using Self-Adaption Technology” (2008-2009) , “Research and Development of High-Performance Down-Sized Devices by Bottom-Up Fabrication Using Single Crystal Nanocubes” (2011-2015) and “Innovative Materials and Devices Using Nanocrystal Engineering” (2016-2018).