in Kyushu. Conversions of local warlords like Ōmura Sumitada, Arima Yoshisada, and Ōtomo Sōrin led to the conversion of many of their subjects. The conversion of several elites in the area was likely due to the decentralized nature of the Sengoku period where warlords vied for control among themselves. This power vacuum led some warlords to believe that being more open to external sources of power and legitimacy as a possible method to gain an advantage. As several daimyos and their subjects converted to Christianity, the destruction of Buddhist and Shinto temples and shrines would often accompany it, with the Jesuits also contributing to the destruction and persecutions. Buddhist monks and Shinto priests would face persecution by being forcefully evicted out of their religious sites, be forced to marry, or pressured to convert. Perceived threat to Japan Under Oda Nobunaga, the Jesuits enjoyed the favor of his regency. The successor of Oda, Toyotomi Hideyoshi at first protected Christianity, however later changed his policy with the publishing of the Bateren Edict, banning missionary activities. After conquering Kyushu, Hideyoshi visited Hakozaki and came to believe that Jesuits were selling Japanese people as slaves overseas, Christians were destroying shrines and temples, and people were being forced to convert to Christianity, resulting in the aforementioned edict. Alessandro Valignano, on 14 December 1582 wrote a letter to Governor-General of the Philippines Francisco de Sande Picón stating that it would be impossible to conquer Japan by military power and converting Japan to Christianity was the most important task of church. Scholars also theorise that Hideyoshi believed the true mission of the Christian missionaries was to convert the Japanese population to Christianity, overthrow the government, and turn it into a colony. In 1637, Matsukura Katsuie misgoverned his territory and imposed a high tax onto people and oppressed Christians. This, combined with famine, led to the Shimabara Rebellion. First it was a peasant movement, but later Christians joined the rebellion, resulting in Ieyasu's ban on Christianity. This was the largest rebellion in the history of Japan and convinced the Shogunate that Christianity was a threat to them, causing them to isolate Japan from the outside world for almost 250 years. Persecution under the Shogunate Under Hideyoshi and the succeeding Tokugawa shogunate, Catholic Christianity was repressed and adherents were persecuted. During Toyotomi rule especially, foreign missionaries were killed in Japan, some by (Japanese-style) crucifixion; most famously, the twenty-six martyrs