Soon after the end of World War Ⅱ,there were erroneous remarks in Japan distorting the history of aggression as well as glorifying the war of aggression.This prompted the reflection and criticism of Japanese progressive scholars,and the issue of Japan's historical understanding was thus born,which affected Sino-Japanese relations in the 1950s and 1960s.After the restoration of diplomatic relations between China and Japan and the signing of the Sino-Japanese Treaty of Peace and Friendship,Japan's historical understanding issue cast a shadow over the"honeymoon period"of Sino-Japanese relations.In the 1980s,there were two textbook controversies as well as Prime Minister Yasuhiro Nakasone's visit to the Yasukuni Shrine.Since the 1990s,with the disintegration of the Soviet Union and the end of the cold war,the international structure has undergone significant changes,and Japan's historical understanding has also become a"bottleneck"restricting Sino-Japanese relations.It has begun to severely affect the sentiments of the Chinese and Japanese people,and has hindered the normalization of relations between the two countries.This situation became particularly apparent in the early 21st century during the terms of Prime Ministers Junichiro Koizumi and Shinzo Abe.China and Japan have conducted in a series of discussions,exchanges and joint research on this issue,both at the grassroots and official levels.However,as of now,there are no apparent significant achievements.The issue of Japan's historical textbook,the Prime Minister's visits to the Yasukuni Shrine,and the denial of wartime atrocities committed by the Japanese military,all reflect Japan's historical understanding.Given that the historical roots,ideological foundations,social bases and even the international environment on this issue have not fundamentally changed,Japan's historical understanding not only requires academic development,but also urgently needs to break through the international political logic.