Matthias Wissuwa is Senior Scientist at JIRCAS and Adjunct Professor in the Department of Global Agricultural Sciences at the University of Tokyo. Before joining JIRCAS in 2005, he spent four years at IRRI as Plant Physiologist. He is a plant breeder and geneticist with a strong interest in stress physiology. At JIRCAS he leads a team working on improving abiotic stress tolerance in rice, with particular emphasis on tolerance to zinc and phosphorus deficiency, improved nutrient utilization efficiency, and tolerance to excess ozone.