After 10 years and after having done all I can to achieve these goals at Nagoya City University, however, it was perhaps time for me to move on and take on new challenges. I had always thought that I, as medical doctor, can serve humankind in four ways: 1) to see patients myself, 2) to train doctors to see patients, 3) to build evidence base to be used in such processes, and 4) to regulate resource allocations so that all #1 through #3 can be maximized. Before becoming professor, I was doing a lot of #1 and some of #3. After becoming department chair, I was doing a little bit of #1, a lot of #2 and some #3. Now it is time for me to do #2 for many more psychiatrists and other mental health professionals across Japan and more of #3 for mental and behavioral problems in the world. KUSPH Department of Health Promotion and Human Behavior appears to offer me such a chance and I would like to meet this challenge.