الأرخبيل الياباني
The Japanese archipelago is the result of subducting tectonic plates over several 100 millions of years from the mid-Silurian (443.8 Mya) to the Pleistocene (11,700 years ago). Approximately of oceanic floor has passed under the Japanese archipelago in the last 450 million years, with most being fully subducted. It is considered a mature island arc.