A group of astronomers led by Taeseok Lee of Seoul National University, South Korea, decided to observe 4C+21.35 using the Korean VLBI Network (KVN) and VLBI Exploration of Radio Astrometry (VERA) array (KaVA). The aim of this observational campaign was to characterize in detail the kinematics of the blazar and to investigate the connection between kinematics and gamma-ray activity in this object.