Yamada obtained a bachelor's degree in applied physics at the University of Tokyo in 1966 and a master's degree in nuclear engineering in 1968, and received a doctorate in physics from the University of Illinois in 1973. He was then at Princeton University and from 1978 at its Princeton Plasma Physics Laboratory (PPPL), where he and Robert Ellis led the development of the Spheromak S-1, a compact toroidal device for plasma confinement from 1978 to 1988, which was investigated for some time as an alternative to the Tokamak.[6] He has been a Principal Research Physicist at the PPPL since 1982 (2015 he is a Distinguished Laboratory Research Fellow). Since the beginning of the 1990s, he has been leading a research program to research magnetic reconnection at the PPPL (Magnetic Reconnection Experiment, MRX) with applications both on fusion plasmas and in astrophysics.[7]
^Kees Bol, Harold P. Furth, Melvin B. Gottlieb, Lyman Spitzer, Thomas H. Stix, Masaaki Yamada, James A. Van Allen; Robert A. Ellis Jr. Physics Today 1 March 1991; 44 (3): 86–88. https://doi.org/10.1063/1.2810048