is a city located in Miyagi Prefecture, Japan. , the city had an estimated population of 62,869 in 27,869 households, and a population density of 3,200 people per km<sup>2</sup>. The total area of the city is . The city was named after Taga Castle, the capital of Mutsu Province from the Nara period.
Tagajà  is in the coastal plains of east-central Miyagi Prefecture, bordered by the Pacific Ocean to the east.
Miyagi Prefecture
Tagajà  has a humid climate (Köppen climate classification Cfa) characterized by mild summers and cold winters. The average annual temperature in Tagajà  is 12.3 ðC. The average annual rainfall is 1225 mm with September as the wettest month. The temperatures are highest on average in August, at around 24.8 ðC, and lowest in January, at around 1.1 ðC.
Per Japanese census data, the population of Tagajà  has recently plateaued after a long period of growth.
The area of present-day Tagajà  was part of ancient Mutsu Province, and has been settled since at least the Jà Âmon period by the Emishi people. Per the Shoku Nihongi, following a huge earthquake in the year 715 AD, a large number of people migrated to this area from the southern Kantà  region, forming numerous fortified settlements in the hinterland. In 729 AD, a large fortified settlement, Taga Castle, was established by the imperial dynasty as a military center to establish control over the region and to protect these colonists. The fortification became the administrative capital of Mutsu Province under the Ritsuryà  system. The tsunami in 869 caused extensive flooding of the Sendai plain, destroying the town of Tagajà Â. Archaeological investigations have identified the remains of 8th and 9th century buildings beneath the present town, covered by sediments dated to the middle of the 10th century.
During the later portion of the Heian period, the area was ruled by the Northern Fujiwara. During the Sengoku period, the area was contested by various samurai clans before the area came under the control of the Date clan of Sendai Domain during the Edo period, under the Tokugawa shogunate.
After the start of the Meiji period, the modern village of Tagajà  was established with the creation of the municipalities system on April 1, 1889. From 1945 to 1954, a United States Army base, Camp Loper, was located in the town. Tagajà  was elevated to town status on July 1, 1951. In the mid-1960s, the town was designated as an industrial development zone due to its proximity to Sendai harbor. Tagajà  was designated a city on November 1, 1971. The city was seriously affected by the tsunami caused by the 2011 Tà Âhoku earthquake. As of April 7, 2011, 177 people were known dead, with 15 missing. 1,811 people were living in shelters.
Tagajà  has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 18 members. Tagajà Â, together with the town of Shichigahama, contributes two seats to the Miyagi Prefectural legislature. In terms of national politics, the city is part of Miyagi 4th district of the lower house of the Diet of Japan.
Sony operates the Sendai Technology Center in Tagajà Â.
East Japan Railway Company (JR East) - TÃ Âhoku Main Line
East Japan Railway Company (JR East) - Senseki Line
Tagajà  is twinned with: