 In Tokyo, geologists and volcanologists around the world become concerned about Japan; one predicts that the archipelagic nation will sink within 40 years.Japanese geoscientist Yusuke Tadokoro doubts the prediction and analyzes rocks in Kyushu, Hokkaido and Mangaia of the Cook Islands, where he hypothesizes that the rock came from the ancient continent of Japan after it split from Pangaea thousands of years ago.Tadokoro realizes Japan will sink in 338.54 days (which is less than a year) instead of the original 40-year estimate.