How was the Island of Japan formed?
japan is made up of 100s of islands. it was made when two plates collided and the resultant crustal uplifting created small islands
japan is located where the pacific plate collides with Philippine plate. both of these plates are oceanic so the denser one subducts beneath the other. due the subduction and collision, small islands were formed. over time when the plates moved, these islands came closer togather and slowly and gradually joined to make the main island of japan