Edwin Reischauer, Japan: Past and Present
The beginnings of the Zen era are about the middle of the twelfth century, when the centuries-long Heian miracle of peace came to an end. The Japanese aristocracy had ruled the land for hundreds of years practically without drawing a sword, using diplomatic suasion so skillful that Heian was probably the only capital city in the medieval world entirely without fortifications. This had been possible partly because of the ruling class's willingness to let taxable lands slip from their control—into the hands of powerful provincial leaders and rich monasteries—rather than start a quarrel. For occasions when force was required, they delegated the responsibility to two powerful military clans, the Taira and the Minamoto, who roamed the land to collect taxes, quell uprisings, and not incidentally to forge allegiances with provincial chieftains. The Taira were in charge of the western and central provinces around Kyoto, while the Minamoto dominated the frontier eastern provinces, in the region one day to hold the warrior capital of Kamakura. The astounding longevity of their rule was a tribute to the aristocrats' skill in playing off these two powerful families against each other, but by the middle of the twelfth century they found themselves at the mercy of their bellicose agents, awakening one day to discover ruffians in the streets of Kyoto as brigands and armed monks invaded the city to burn and pillage.
The real downfall of the ancien regime began in the year 1156, when a dispute arose between the reigning emperor and a retired sovereign simultaneously with a disagreement among the aristocracy regarding patronage. Both sides turned to the warriors for support—a formula that proved to be extremely unwise. The result was a feud between the Taira and Minamoto, culminating in a civil war (the Gempei War) that lasted five years, produced bloodshed on a scale previously unknown in Japan, and ended in victory for the Minamoto. A chieftain named Minamoto Yoritomo emerged as head of a unified state and leader of a government whose power to command was beyond question. Since Yoritomo's position had no precedent, he invented for himself the title of shogun. He also moved the government from Kyoto to his military headquarters at Kamakura and proceeded to lay the groundwork for what would be almost seven hundred years of unbroken warrior rule.
The form of government Yoritomo instituted is generally, if somewhat inaccurately, described as feudalism. The provincial warrior families managed estates worked by peasants whose role was similar to that of the European serfs of the same period. The estate-owning barons were mounted warriors, new figures in Japanese history, who protected their lands and their family honor much as did the European knights. But instead of glorifying chivalry and maidenly honor, they respected the rules of battle and noble death. Among the fiercest fighters the world has seen, they were masters of personal combat, horsemanship, archery, and the way of the sword. Their principles were fearlessness, loyalty, honor, personal integrity, and contempt for material wealth. They became known as samurai, and they were the men whose swords were ruled by Zen.
Battle for the samurai was a ritual of personal and family honor. When two opposing sides confronted one another in the field, the mounted samurai would first discharge the twenty to thirty arrows at their disposal and then call out their family names in hopes of eliciting foes of similarly distinguished lineage. Two warriors would then charge one another brandishing their long swords until one was dismounted, whereupon hand-to-hand combat with short knives commenced. The loser's head was taken as a trophy, since headgear proclaimed family and rank. To die a noble death in battle at the hands of a worthy foe brought no dishonor to one's family, and cowardice in the face of death seems to have been as rare as it was humiliating. Frugality among these Zen-inspired warriors was as much admired as the soft living of aristocrats and merchants was scorned; and life itself was cheap, with warriors ever ready to commit ritual suicide (called seppuku or harakiri) to preserve their honor or to register social protest.
Yoritomo was at the height of his power when he was killed accidentally in a riding mishap. Having murdered all the competent members of his family, lest they prove rivals, he left no line except two ineffectual sons, neither of whom was worthy to govern. The power vacuum was filled by his in-laws of the Hojo clan, who very shortly eliminated all the remaining members of the Minamoto ruling family and assumed power. Not wishing to appear outright usurpers of the office of shogun, they invented a position known as regent, through which they manipulated a hand-picked shogun, who in turn manipulated a powerless emperor. It was an example of indirect rule at its most ingenious.
Having skillfully removed the Minamoto family from ruling circles, the Hojo Regency governed Japan for over a hundred years, during which time Zen became the most influential religion in the land. It was also during this time that Zen played an important role in saving Japan from what was possibly the greatest threat to its survival up to that time: the invasion attempts of Kublai Khan. In 1268 the Great Khan, whose Mongol armies were in the process of sacking China, sent envoys to Japan recommending tribute. The Kyoto court was terrified, but not the Kamakura warriors, who sent the Mongols back empty-handed. The sequence was repeated four years later, although this time the Japanese knew it would mean war. As expected, in 1274 an invasion fleet of Mongols sailed from Korea, but after inconclusive fighting on a southern beachhead of Kyushu, a timely storm blew the invaders out to sea and inflicted enough losses to derail the project. The Japanese had, however, learned a sobering lesson about their military preparedness. In the century of internal peace between the Gempei War and the Mongol landing, Japanese fighting men had let their skills atrophy. Not only were their formalized ideas about honorable hand-to-hand combat totally inappropriate to the tight formations and powerful crossbows of the Asian armies (a samurai would ride out, announce his lineage, and immediately be cut down by a volley of Mongol arrows), the Japanese warriors had lost much of their moral fiber. To correct both these faults the Zen monks who served as advisers to the Hojo insisted that military training, particularly archery and swordsmanship, be formalized, using the techniques of Zen discipline. A system of training was hastily begun in which the samurai were conditioned psychologically as well as physically for battle. It proved so successful that it became a permanent part of Japanese martial tactics.
The Zen training was urgent, for all of Japan knew that the Mongols would be back in strength. One of the Mongols' major weapons had been the fear they inspired in those they approached, but fear of death is the last concern of a samurai whose mind has been disciplined by Zen exercises. Thus the Mongols were robbed of their most potent offensive weapon, a point driven home when a group of Mongol envoys appearing after the first invasion to proffer terms were summarily beheaded.
Along with the Zen military training, the Japanese placed the entire country on a wartime footing, with every able-bodied man engaged in constructing shoreline fortifications. As expected, in the early summer of 1281 the Khan launched an invasion force thought to have numbered well over 100,000 men, using vessels constructed by Korean labor. When they began landing in southern Kyushu, the samurai were there and ready, delighted at the prospect of putting to use on a common adversary the military skills they had evolved over the decades through slaughtering one another. They harassed the Mongol fleet from small vessels, while on shore they faced the invaders man for man, never allowing their line to break. For seven weeks they stood firm, and then it was August, the typhoon month. One evening, the skies darkened ominously in the south and the winds began to rise, but before the fleet could withdraw the typhoon struck.