Keisuke was a member in theoretical group of LeCosPA from Sep. 2011 to June 2015. His main fields are gravitational theory and cosmology. He wrote 19 papers in LeCosPA with his collaborators (including LeCosPA members and students). One of paper with Yen Chin, who was a student in LeCosPA, was selected as a 2013-2014 highlight of Classical and Quantum Gravity.
Keisuke moved to Barcelona University as a postdoctoral fellow in July 2015. He belonged to string-theory group there and worked on higher dimensional Black hole physics.
http://web.ffn.ub.edu/ (in Catalan)
Now, Keisuke is an assistant professor in KMI, Nagoya University, Japan. He keeps working on gravitational physics and give lectures in department of Mathematics in Nagoya University.