You will be given a definition of a task first, then some input of the task.
In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

The last "ancient" time period of this nation is named after the burial mounds, or kofun, of that time period. The Gempei War ended the Heian period of this country. Francis Xavier, a Jesuit missionary, and Commodore Matthew Perry came to this country during the Tokugawa Shogunate. For 10 points, name this country formerly ruled by Emperor Hirohito where two atomic bombs were dropped.
Output:
History