The Spanish and Portuguese kings supported missionary activity, and merchant vessels soon brought Catholic missionaries to East Asia. The Jesuit priest Francis Xavier had worked in India and the Indies before China and Japan attracted his attention. In 1549 he landed on Kyushu, Japan’s southernmost island (see Map 21.2). After he was expelled by the local lord, he traveled throughout western Japan as far as Kyoto, proselytizing wherever warlords allowed. He soon made many converts among the poor and even some among the daimyo. Xavier then set his sights on China but died on an uninhabited island off the China coast in 1552.

Other missionaries carried on his work, and by 1600 there were three hundred thousand baptized Christians in Japan. Most of them lived on Kyushu, where the shogun’s power was weakest and the loyalty of the daimyo most doubtful. In 1615 bands of Christian samurai supported Tokugawa Ieyasu’s enemies at the Battle of Osaka. A couple of decades later, thirty thousand peasants in the heavily Catholic area of northern Kyushu revolted. The Tokugawa shoguns thus came to associate Christianity with domestic disorder and insurrection. Accordingly, what had been mild persecution of Christians became ruthless repression after 1639.

Meanwhile, in China the Jesuits concentrated on gaining the linguistic and scholarly knowledge they would need to convert the educated class. The Jesuit Matteo Ricci studied for years in Macao before setting himself up in Nanjing and trying to win over members of the educated class. In 1601 he was given permission to reside in Beijing, where he made several high-placed conversions. He also interested educated Chinese men in Western geography, astronomy, and Euclidean mathematics.

Ricci and his Jesuit successors believed that Confucianism was compatible with Christianity. The Jesuits thought that both faiths shared similar concerns for morality and virtue. The Franciscan and Dominican friars disagreed with the Jesuit position. In 1715 religious and political quarrels in Europe led the pope to decide that the Jesuits’ accommodating approach was heretical. Angry at this insult, the Kangxi emperor forbade all Christian missionary work in China.