The document summarizes research from the Bio-Medical Precision Engineering Lab at the University of Tokyo, focusing on three areas: computer aided surgery, robotics for computer-aided surgery, and electrophysiology of arrhythmias. It describes using 5-Aminolevulinic Acid to help identify malignant brain tumors during surgery through fluorescence. It also discusses a New Energy and Industrial Technology Development Organization project to develop intelligent surgical instruments for minimally invasive thoracic surgery. Finally, it examines optical mapping of cardiac excitations using voltage-sensitive dyes to study ventricular tachycardia and fibrillation.