Katsuto Tanaka is Professor Emeritus at Hitotsubashi University, Tokyo. He is a recipient of the Tjalling C. Koopmans Econometric Theory Prize (1996), the Japan Statistical Society Prize (1998), and the Econometric Theory Award (1999). He previously authored 'Time Series Analysis' (First Edition 1996, Second Edition 2017) and six statistics and econometrics books in Japanese.