He received his PhD in 1998 from the Tokyo Institute of Technology, Japan. He developed a novel living coordination polymerization of allene derivatives by the ?-allylnickel catalyst and developed many experimental skills, not only for polymerization but also for organic synthesis. He started his academic career at the Nagoya Institute of Technology and launched several research themes, including controlled radical polymerization by utilizing chalcogen compounds, the synthesis of hyperbranched polymers based on triazine chemistry, and the development of ?-conjugated oligomeric and polymeric materials. Dr. Takagi’s research focuses on the precision spatial arrangement of chromophores using well-defined scaffolds, the controlled synthesis of 2D polythiophene derivatives, and the manipulation of electron donor–acceptor interaction in fused ?-conjugated imidazolium compounds.