Tokiyori died in 1263, and his young son Tokimune (1251--84), who came to power five years later, initially showed no interest in Zen practice. But he was still in his teens in 1268 when there appeared in Japan envoys from Kublai Khan demanding tribute. The Mongols were at that moment completing their sack of China, and Japan seemed the next step. Undeterred, the Japanese answered all Mongol demands with haughty insults, with the not-unexpected result that in 1274 Kublai launched an invasion fleet. Although his ships foundered in a fortuitous streak of bad weather, the Japanese knew that there would be more. It was then that Tokimune began strengthening his discipline through Zen meditation and toughening his instincts with koans. He studied under a newly arrived Chinese master whose limited Japanese necessitated their communicating through a translator. (When the enlightened Chinese found cause to strike his all-powerful student, he prudently pummeled the interpreter instead.)5 The samurai also began to take an interest in Zen, which naturally appealed to the warrior mentality because of its emphasis on discipline, on experience over education, and on a rough- and-tumble practice including debates with a master and blows for the loser--all congenial to men of simple, unschooled tastes. For their own part, the perceptive Chinese missionaries, hampered by the language barrier, rendered Zen as simplistic as possible to help the faith compete with the Salvationist sects among the often illiterate warriors. In 1281 the Mongols launched another invasion force, this time 100,000 men strong, but they were held off several weeks by the steel-nerved samurai until a typhoon (later named the Kamikaze or "Divine Wind") providentially sank the fleet. The extent to which Zen training aided this victory can be debated, but the courage of Tokimune and his soldiers undoubtedly benefited from its rigorous discipline. The Japanese ruler himself gave Zen heavy credit and immediately began building a commemorative Zen monastery in Kamakura.