Why did so many Japanese pirates, especially Jiajing, start from the Ming Dynasty? It's ridiculous to hear that most Japanese pirates are familiar with roads.

Japanese invaders attacked China in Ming Dynasty, which can be roughly divided into two periods. In the meantime, the area and degree of Japanese invasion are also different. In the early stage, about Hongwu and Yongle years. Disturbed areas are mainly in coastal areas such as Liaodong, Shandong and Zhejiang, with small-scale harassment as the main activity mode. In the later period, during Jiajing period, Japanese pirates concentrated on large-scale invasion of southeast coastal areas. During the forty-five years of Jiajing, the number of Japanese pirates soared to 628, accounting for 80% of the number of Japanese pirates in the Ming Dynasty.

Mainly because since the middle of the Ming Dynasty, the political affairs of the dynasty have become increasingly corrupt, the military of the Ming Dynasty has been weakened from the strong, the coastal defense has been abandoned, and the defense forces have been seriously damaged. Moreover, in the middle and late Ming Dynasty, after the Chahar Department of the Northern Yuan Dynasty moved eastward, it fought repeatedly with the Ming Dynasty in Liaodong for a long time and suffered heavy losses. The remnants of the Yuan Dynasty frequently went south, and the Ming court was forced to dispatch elite troops to defend the capital and the Great Wall. As a result, the coastal defense was stretched, and the Japanese invaders invaded the southeast on a large scale.

From the Japanese side, after Jiajing, Japan entered the Warring States period. Japanese pirates, with the support of feudal princes, colluded with China pirates Wang Zhi and Xu Hai to attack coastal towns in Jiangsu, Zhejiang and Fujian on a large scale.

Historians in East Asian countries have different definitions of the enemy. In a word, the composition of the enemy is very complicated. During the Jiajing period, the official statement about "Japanese pirates" was that Japanese accounted for three tenths, China accounted for seven tenths, and Japanese dominated.