Why was Christianity prohibited in Japan?
Toyotomi Hideyoshi, Japan’s most powerful lord in the late 16th century, decided to expel Christian missionaries from Japan because he found it troublesome that baptised feudal lords (Kirishitan Daimyo) strengthened their relationships to missionaries, and committed various acts without his permission, such as ceding their territories to missionaries. However, his edict was not fully carried out because the profits from overseas trade with Europeans, mediated by missionaries, were too considerable to ignore. Tokugawa Ieyasu, who ruled the country after the death of Hideyoshi, tolerated the Christian faith at first, but finally banned Christianity in the entire country, to strengthen the foundation for the Tokugawa family-led regime.
For more details, please access the web page ‘To learn the history of the property’.