Tadaaki Ikoma received his M.S. degrees in science from Tohoku University in 1988 and the Ph.D. degree in science in 1993 from Tohoku University. Since 1989-2007, he worked at The Chemical Research Institute of Non-aqueous Solutions, which was reorganized to Institute of Chemical Reaction Science in 1991 and then to Institute of Multidisciplinary Research for Advanced Materials in 2001, Tohoku University as a research associate. During this period, he collaborated with Faculty of Physics, Leiden University (The Netherlands) in 1996-1997. He has joined to Faculty of Science, Niigata University from 2007 as an associate professor and been promoted to professor in 2012. He was also a researcher of Japan Science and Technology Agency in 2006-2010 and a director of Center for Instrumental Analysis, Niigata University in 2013-2017, and has been a member of International Advisary Committee of Topical Meeting on Spins in Organic Semiconductors from 2010 and vice president of the Society of Electron Spin Science and Technology (SEST) from 2016. He is the author of more than 80 articles, 8 chapters in books and more than 350 conference presentations. In 2003, SEST selected him to receive the Young Investigator Award.

Research interests: structure and dynamics of exciton and charged carrier in organic semiconductors using magnetoresponses of optoelectronic properties and EPR.