1962	Graduated from University of Tokyo, School of Medicine
1963～1966	Postgraduate Training, University of Tokyo, School of Medicine, Department of Pediatrics equivalent to residency (under Prof. Tadao Takatsu)
1966～1973	Equivalent to House Staff, University of Tokyo, School of Medicine, Department of Pediatrics
1971.4～1985.3	Part-time Lecturer, Toho University School of Medicine, Department of Pediatrics
1972.4～1995.3	Part-time Lecturer, Tokyo University School of Medicine, Department of Pediatrics
1972.11～1988.3	Part-time Lecturer, Ochanomizu University, Children’s Science Department
1973.11～2014.12	Director, Segawa Neurological Clinic for Children
1980.11～2013.3	Part-time Lecturer, Juntendo University School of Medicine, Department of Neurology
1984.4～2013.3	Part-time Lecturer, Iwate University School of Medicine, Department of Neurology
1985.4～2009.3	Visiting Lecturer, Toho University School of Medicine, Department of Pediatrics
1996.7～2004.3	Visiting Professor, Dokkyo University School of Medicine, Department of Neurology
2004.4～2014.12	Special Appointed Professor, Dokkyo University School of Medicine, Department of Neurology
2010.4～2012.3	Visiting Professor, Toho University School of Medicine, Department of Pediatrics

Major Accomplishments

Proposed his observation on high prevalence in Japan
and Ocular muscle type of Myasthenia Gravis in Childhood

1970	Found the first case of Segawa disease –two girl patients of cousins with dystonia with diurnal fluctuation
1970	Published clinical studies on Congenital Muscular Dystrophy Published the twins’ cases as “Hereditary Progressive basal ganglia disorders with L-Dopa which showed dramatic effects”
1973	Introduced pathological study on basal ganglia of developmental disorder by all night EEG Published “Body movements during sleep in dystonia of childhood” Proposed significance of development of aminergic neurons in child neurological disorder Proposed nomenclature of “Fukuyama-Type Congenital Muscular Dystrophy” Examined another lady and confirmed this disease as dystonia not converting Parkinson’s disease in old age and published and proposed nomenclature of “Hereditary progressive dystonia with diurnal fluctuation (HPD)” Proposed relationship between the onset of Tourette syndrome and aminergic neurons in child neurological disorder
1982	Developed body movement detector system for all night EEG
1983	Started Low dose L-dopa Therapy to dopamine neuron (DA) receptor supersensitivity
1984	Published Rett syndrome’s clinical studies and pathophysiological consideration firstly in Japan
1988	Published his observation on “Possible abnormality of aminergic neurons in Rett syndrome”
1990	Held the first Symposium on Rett Syndrome in Japan Confirmed the Segawa Disease gene of GCH1 in chromosome 14q22.1-q22.2, by co-working with Ichinose
2000	Held World Congress on Rett Syndrome 2000 in Nagano
2002	Held “Tourette Syndrome Symposium”
2002	Held 1st “Workshop on Methylation and Child Neurology”
2003	Held 2nd “Workshop on Methylation and Child Neurology”
2004	Held “Ceruloplasmin and the Basal Ganglia”
2005	Held “Sleep and development of the brain”
2006	Held the first seminar “Brain Development and Neuroscience” – Sleep and Locomotion-
2006	Held “Brain development during fetus and later behavior”