Assoc. Prof Takanori Kihara, The University of Kitakyushu, visited Tokyo Women’s Medical University from September 26 to September 30, 2016. During the stay, he was learning about the technology of transfecting nucleotides using non-viral vectors, which was provided by Korean team. This is collaboration work with Assist. Prof. Hyukjin Lee, Ewha Womans University, for accelerating vascularization within cell sheet-based tissues.