I did my PhD and clinical training in Tokyo. My doctoral dissertation investigated the cognitive process in which perfectionism personality leads to positive and negative consequences. I moved to Institute of Psychiatry, Kings College London to do my post-doctoral project on reassurance seeking in obsessive-compulsive disorder (OCD). In severe anxiety disorders such as OCD, reassurance can cease to be a benign way of reducing anxiety and may instead become part of an escalating pattern of anxiety-related behaviours, not only for the sufferer but also for those who are close to them and are trying to help. After returning to Japan, I have expanded my research project on reassurance seeking to health anxiety. In the case of health anxiety, reassurance seeking is related to the social cost (e.g. by frequent GP visit and request for medical exams) and the personal cost (e.g. buying unnecessary over-the-counter drugs). Moreover, along with three other psychiatrists, I established a CBT training course in Chiba University, in order to increase the number of cognitive behavioural therapists. In addition to the research projects on OCD, health anxiety, and perfectionism, I am currently interested in facilitating help seeking behaviour in young adults and athletes. Areas of Expertise Cognitive behavioural therapy Obsessive-Compulsive Disorder Health Anxiety Perfectionism Reassurance Seeking and Help Seeking Sport Psychology

Halldorsson, B., Salkovskis, P., Kobori, O. & Pagdin, R. (2015). I do not know what else to do: Caregivers' perspective on reassurance seeking in OCD. Journal of Obsessive-Compulsive and Related Disorders 8, 21-30. https://cronfa.swan.ac.uk/Record/cronfa24900 doi:10.1016/j.jocrd.2015.11.003 Yoshinaga, N., Matsuki, S., Niitsu, T., Sato, Y., Tanaka, M., Ibuki, H., Takanashi, R., Ohshiro, K., Ohshima, F., Asano, K., Kobori, O., Yoshimura, K., Hirano, Y., Sawaguchi, K., Koshizaka, M., Hanaoka, H., Nakagawa, A., Nakazato, M., Iyo, M. et. al. (2016). Cognitive Behavioral Therapy for Patients with Social Anxiety Disorder Who Remain Symptomatic following Antidepressant Treatment: A Randomized, Assessor-Blinded, Controlled Trial. Psychotherapy and Psychosomatics 85(4), 208-217. https://cronfa.swan.ac.uk/Record/cronfa28398 doi:10.1159/000444221 Salkovskis, P. & Kobori, O. (2015). Reassuringly calm? Self-reported patterns of responses to reassurance seeking in obsessive compulsive disorder. Journal of Behavior Therapy and Experimental Psychiatry 49, 203-208. https://cronfa.swan.ac.uk/Record/cronfa23193 doi:10.1016/j.jbtep.2015.09.002 Tanaka, Y., Kobori, O. & Nakazato, M. (2015). Changes in picturing of ‘self’ in social anxiety disorder: a case report. The Cognitive Behaviour Therapist 8 https://cronfa.swan.ac.uk/Record/cronfa20195 doi:10.1017/S1754470X15000033 Osamu Kobori, M. (2014). Cognitive-Behavioral Therapy for Health Anxiety Disorder: A Case Report of a Japanese Male Suffering the After Effects of Apoplexy and Attempted Suicide. Journal of Psychotherapy & Psychological Disorders 02(01) https://cronfa.swan.ac.uk/Record/cronfa24896 doi:10.4172/2327-4654.1000102