摘要：日本的天皇制可以說是世界歷史上存在時間比較長的君主制度。它作為一種制度，經歷了古代、近代、現代三個不同的發展階段，至今已有1300多年的歷史。并且在這么長的時間中，其皇室從未被取代，天皇制也從未間斷，這在王室、王朝興亡更迭異常激烈的世界歷史中是極其罕見的，可以說絕無僅有。天皇制可以說既是歷史學的問題，也是政治學的問題，準確客觀地研究分析天皇制，可以讓我們更加深入準確地了解日本，從而制定出科學的對日政策。因此，本文將著眼于日本天皇制得以續存至今的原因，從日本的國內因素及國際因素兩個大的方面入手，來對這一問題進行一些探討。其中，國內因素又分為自然環境、文化環境、精神構造、社會結構、天皇制自身特征等方面，國際因素就是二戰后的國際形勢，主要是其中的美國因素和中國因素。

關鍵詞：天皇制  長期存在  國內因素  國際因素

Abstract: Japan's Mikado system can be said to exist in the history of the world with a very long time. As an institution, it has experienced ancient, modern, postmodern three different stages of development, and it has been 1300 years of history. In such a long time, the royal family has never been replaced, Mikado has never stopped, which in the royal family, the change of dynasties rise and fall of fierce history of the world is extremely rare, it can be said unique. Mikado can say that the problem is not only history, but also the problem of political science, accurate and objective research and analysis Mikado, allows us to be more in-depth and accurate understanding of Japan, so as to formulate a scientific policy towards Japan. Therefore, this article will focus on the causes of Japan's imperial system to be surviving so far, starting from the two major aspects of domestic factors and international factors in Japan to carry out some research on this issue. Among them, the domestic factors are divided into the natural environment, cultural environment, mental structure, social structure, Mikado's own characteristics, the international factor is the international situation after World War II and the United States and China factor is the most important factor.

Key words: Mikado System  long-standing  domestic factors   international factors