Dr. Tajima was born in Japan in 1976. After graduating from Keio University School of Medicine, he was employed at the Department of Pathology at Keio University School of Medicine, where he learned pathological anatomy and diagnostic pathology. After two years, he moved to the Department of Radiology at St. Marianna University School of Medicine to study breast imaging. He has presented some scientific exhibitions about radio-pathological correlation of the breast in domestic and international congresses. He studied at St. Marianna University Graduate School of Medicine for four years. After acquiring a PhD in radiolo-pathology, he has done some research about the comparison of pathologic features and radiologic imaging findings at the St. Marianna University School of Medicine Department of Pathology and Radiology.