Masaru Yao received Ph.D. in physical organic chemistry at Keio University (Japan) in 2005. During the Ph.D. course, he was engaged in the study of Langmuir-Blodgett film and molecular magnetism, and synthesized various novel heterocyclic compounds. After that he started to study battery materials for use in nickel/metal-hydride batteries, lithium ion batteries, and electric double layer capacitors in the National Institute of Advanced Industrial Science and Technology (AIST). He is now a senior research scientist at the Research Institute of Electrochemical Energy, Department of Energy and Environment, AIST. His research interest includes the design and synthesis of organic materials for use in rechargeable batteries. He has published more than 20 papers in the field of organic battery since 2010 and have reported a dozen of molecule-based active materials.