was founded in Sendai in 1907 and became the first Japanese university to admit female students in 1913. Sendai was incorporated as a city on 1 April 1889, with the post-Meiji restoration creation of the modern municipalities system following the abolition of the han system. At the time of incorporation, the city's area was and its population was 86,000. The city grew, however, through seven annexations that occurred between 1928 and 1988. The city became a designated city on 1 April 1989; the city's population exceeded one million in 1999. Sendai was considered to be one of Japan's greenest cities, mostly because of its great numbers of trees and plants. Sendai became known as The City of Trees before the Meiji Restoration, after the feudal Sendai Domain encouraged residents to plant trees in their gardens. As a result, many houses, temples, and shrines in central Sendai had , which were used as resources for wood and other everyday materials. In 1925, the Senseki Line to Sendai Station became the first underground railway segment in Japan, preceding the opening of the Tokyo Metro Ginza Line (Asia's first subway line) by two years. The 2nd Infantry Division was known as the "Sendai Division" as it was based in Sendai, and recruited locally. During the Second World War it was involved in many different campaigns, but one of the most important was the Battle of Guadalcanal. During the bombing of Sendai during World War II by the United States on 10 July 1945, much of the historic center of the city was burned, with 2,755 inhabitants killed and 11,933 houses destroyed in the city. Postwar development Following World War II, the city was rebuilt, and Sendai became a vital transportation and logistics hub for the Tōhoku region with the construction of major arteries such as the Tōhoku Expressway and Tōhoku Shinkansen. In the early 1950s, the United States Army, Japan operated Camp Schimmelpfennig and Camp Sendai in the city. Sendai has been subject to several major earthquakes in recent history, including the 1978 Miyagi earthquake, which was a catalyst for the development of Japan's current earthquake resistance standards, and the 2005 Miyagi earthquake. Most recently, the coastal area of Sendai, including Sendai Airport, was severely damaged in the 2011 Tōhoku earthquake and tsunami. The tsunami reportedly reached as far as Wakabayashi Ward Office, from the coastline. Thousands were killed, and countless more were