Taku Onishi is a Japanese scientist. He graduated from the Faculty of Science, Osaka University, Japan, in 1998, and was awarded his Ph.D. from the Department of Chemistry of Osaka University in 2003. He was appointed to a permanent position at the Faculty of Engineering, Mie University, Japan, in 2003. He has been a guest researcher at the Department of Chemistry, University of Oslo, Norway, since 2010. His research covers a variety of fields such as quantum chemistry, computational chemistry, quantum physics, and materials science. He has published the well-received Springer books Quantum Computational Chemistry (2018) and Theoretical Chemistry for Advanced Nanomaterials (2020). He was the chair of a quantum science symposium in the International Conference of Computational Methods in Sciences and Engineering conference in 2020.