I have looked over these sites and have put them down for you as value added sites. This means that there is a direct match between the questions you have to research and what is found here. Use these sites first before you go off and explore on your own!
1. Tectonics and Volcanoes of Japan
2. Japan Volcanoes and Volcanics vulcan.wr.usgs.gov/Volcanoes/Japan/description_japan_volcanoes.html
3. Map of Active Volcanoes in Japan http://hakone.eri.u-tokyo.ac.jp/vrc/VRC.html
4. Volcanoes in Japan from the Global Volcanism Project from the Smithsonian Museum.
5. Types of Volcanoes and Their Characteristics from Volcano World