Dr. Juri Kivelev from Helsinki University Hospital, Finland visited Saiseikai Toyama Hospital to study the higher magnification microscope for super-microsurgery. This microscope system was developed by Mitaka Kohki Co. Ltd. and Dr. Nobuhisa Matsumura at Department of Neurosurgery, Saiseikai Toyama Hospital, Toyama, Japan. The microscope system (MM50/YOH) enables us to perform STA-MCA anastomosis and clipping surgery under 30x to 50x magnification, which was impossible before.