Psychological research in the field of psychiatry has focused on the negative aspects of the disease, and main treatment approaches have attempted their amelioration. We have conducted cognitive neuroscience research on themes such as emotion, although we focused mainly on negative emotions. There seem to be several reasons why positive psychology has attracted attention in recent years. I personally have come to feel the importance of positive psychology through clinical practice. Once a neuropsychiatric disorder such as depression or anxiety disorder has developed, it takes a considerable amount of time and effort to recover, and there are many cases of recurrence and refractoriness. Thus, obviously, it is equally or even more important to prevent it before it becomes a reality. I believe that positive psychology is useful for preventing diseases in advance, to prevent recurrence, prolongation, and so on. The topic of dealing with positive psychology is diverse, but relative neuroscientific research is still insignificant. Furthermore, when it comes to the neuroscience of positive psychiatry, it is even less so. In this article, I will introduce our neuroscience research on positive illusion, biased positive evaluation/cognition about self, and neuroimaging studies that applied self-efficacy, which is a popular theme in positive psychology, for addiction treatment.
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