Dr. Itoh finished his PhD course (industrial chemistry) at The University of Tokyo in 1978. From 1978 to 1989, he worked for Professors Honda and Fujishima at The Unversity of Tokyo as assistant professor and also lecturer. They are famous in the field of photoelectrochemistry, with which most climate scientists sare not familiar with. In this field, Itoh's greatest contribution is the development of optical waveguide spectroscopy for solid surfaces, for which he received awarded from relevant academic societies. From 1989 to now Itoh has been working at Yokohama National University, mostly in the field of environmental metrology including optical biochemical sensing and theoretical as well as experimental biodiversity measurements. For instance, he has recently developed extremely highly sensitive gas sensing systems and two-dimensional DNA electrophoresis methods.
His interest in the global warming issue started when he had a lecture on environmental metrology in 1995 or so. He was rather surprised at that time to know how this issue was ambiguous unlike stories that conventional news or opinions tell us. For instance, he wondered why the effect of solar changes had been neglected by most climatologists, when he saw in Science a Letter article from the Danish Meteorological Institute in 1997. Itoh also felt it was dangerous that the Japanese society was going to increase nuclear power plants to decrease carbon dioxide, and thought that he had to do something for this situation.
Since then, Itoh have written (or participated in) four books on this issue including the present one. He also took a patent on sunspot number anticipation, and did some contribution to the IPCC AR4 as an expert reviewer.