7 Essential Words of Fall
city, Osaka fu (urban prefecture), Honshu, Japan, on Osaka Bay. Many large earthen tomb mounds in the area attest to the city's antiquity. The mausoleum of the emperor Nintoku-1,594 feet (486 m) long and 115 feet (35 m) high-is the largest in Japan. Sakai was a leading seaport and commercial centre from the mid-14th to the mid-17th century. Its rich merchants traded with China, Korea, the Ryukyu Islands, and Europe. Its importance waned, however, after the institution of the national seclusion policy in 1639 and a shift in the course of the Yamato River, which silted its harbour, early in the 18th century. The city sank into obscurity as Osaka rose to commercial and industrial greatness.