Explanation:
The first human habitation in the Japanese archipelago has been traced to prehistoric times around 30,000 BC. The Jōmon period, named after its cord-marked pottery, was followed by the Yayoi in the first millennium BC when new technologies were introduced from continental Asia. During this period, the first known written reference to Japan was recorded in the Chinese Book of Han in the first century AD.
Between the fourth century and the ninth century, Japan's many kingdoms and tribes gradually came to be unified under a centralized government, nominally controlled by the Emperor of Japan. This imperial dynasty continues to reign over Japan. In 794, a new imperial capital was established at Heian-kyō (modern Kyoto), marking the beginning of the Heian period, which lasted until 1185.
Over the following centuries, the power of the emperor and the imperial court declined, passing first to great clans of civilian aristocrats – most notably the Fujiwara – and then to the military clans and their armies of samurai. The Minamoto clan under Minamoto no Yoritomo emerged victorious from the Genpei War of 1180–85, defeating their rival military clan, the Taira. After seizing power, Yoritomo set up his capital in Kamakura and took the title of shōgun. In 1274 and 1281, the Kamakura shogunate withstood two Mongol invasions, but in 1333 it was toppled by a rival claimant to the shogunate, ushering in the Muromachi period. During the Muromachi period regional warlords called daimyō grew in power at the expense of the shōgun. Eventually, Japan descended into a period of civil war. Over the course of the late sixteenth century, Japan was reunified under the leadership of the prominent daimyō Oda Nobunaga and his successor Toyotomi Hideyoshi. After Hideyoshi's death in 1598, Tokugawa Ieyasu came to power and was appointed shōgun by the emperor. The Tokugawa shogunate, which governed from Edo (modern Tokyo), presided over a prosperous and peaceful era known as the Edo period (1600–1868). The Tokugawa shogunate imposed a strict class system on Japanese society and cut off almost all contact with the outside world. Portugal and Japan started their first affiliation in 1543, when the Portuguese became the first Europeans to reach Japan by landing in the southern archipelago. They had a significant impact on Japan, even in this initial limited interaction, introducing firearms to Japanese warfare. The American Perry Expedition in 1853–54 more completely ended Japan's seclusion; this contributed to the fall of the shogunate and the return of power to the emperor during the Boshin War in 1868.
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