is the capital city of Miyagi Prefecture, the largest city in the Tōhoku region. , the city had a population of 1,091,407 in 525,828 households, and is one of Japan's 20 designated cities. The city was founded in 1600 by the daimyō Date Masamune. It is nicknamed the ; there are Japanese zelkova trees lining many of the main thoroughfares such as and . In the summer, the Sendai Tanabata Festival, the largest Tanabata festival in Japan, is held. In winter, the trees are decorated with thousands of lights for the , lasting through most of December. On 11 March 2011, coastal areas of the city suffered catastrophic damage from a magnitude 9.0 offshore earthquake, which triggered a destructive tsunami. History Edo period Although the Sendai area was inhabited as early as 20,000 years ago, the history of Sendai as a city begins from 1600, when the daimyō Date Masamune relocated. Masamune was not happy with his previous stronghold, Iwadeyama, which was located in the northern portion of his territories and was difficult to access from Edo (modern-day Tokyo). Sendai was an ideal location, being in the centre of Masamune's newly defined territories, upon the major road from Edo. Tokugawa Ieyasu gave Masamune permission to build a new castle in Aobayama after the Battle of Sekigahara. The previous ruler of the Sendai area had used a castle located on Aobayama. At this time Sendai was written as ("a thousand generations"), because a temple with a used to be located in Aobayama. Masamune changed the kanji to "", which later became "" (literally: "hermit/wizard" plus "platform/plateau" or figuratively, "hermit on a platform/high ground"). The character came from a Chinese poem that praised a palace created by the Emperor Wen of Han China (reigned 180–157 BCE), comparing it to a mythical palace in the Kunlun Mountains. Tradition says that Masamune chose this kanji so that the castle would prosper as long as a mountain inhabited by an immortal hermit. Masamune ordered the construction of Sendai Castle in December 1600 and the construction of the surrounding castle town in 1601. The grid plan roads in modern-day central Sendai are based upon his plans. Modern era The first railway line between Sendai and Tokyo, now the Tōhoku Main Line, opened in 1887, bringing the area within a day's travel from Tokyo for the first time in history. Tohoku Imperial University, the region's first university,