2014 Mount Ontake Eruption (image) University of Tokyo Share Print E-Mail Caption Mount Ontake is located 200 km west of Tokyo on the border of Gifu and Nagano Prefectures. This image shows the continued release of steam and gas from the volcano after the eruption. Credit Earthquake Research Institute, The University of Tokyo Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.