Sendai Castle Ruins

The Formation of Sendai Castle
▶ When was it constructed?
Sendai Castle was built by the first lord of the Sendai Domain, Date Masamune. In December of the 5th year of the Keicho era (1600), shortly after the Battle of Sekigahara, the castle's layout was drawn, and construction began in January of the following year. It is believed that the construction was roughly completed by the 7th year of the Keicho era (1602).
The main keep of Sendai Castle was a "mountain castle" that skillfully utilized the natural topography, with steep cliffs on the east facing the Hirose River, the western side bordered by a mountain forest known as "Ourabayanishi," and the southern side surrounded by the Tatsu no Kuchi Gorge.
After Masamune's death, the second lord, Tadamune, built a secondary enclosure (Ninomaru) in the foothills. After the completion of Ninomaru in the 16th year of the Kan'ei era (1639), it became the center of domain administration until the end of the Edo period.
After the abolition of feudal domains and the establishment of prefectures in the Meiji era, Sendai Castle came under the jurisdiction of the Meiji government. In the 4th year of the Meiji era (1871), military facilities were established in Ninomaru, but most of these buildings were destroyed in a fire in the 15th year of the Meiji era (1882). It is said that buildings in the main keep were also demolished in the early years of the Meiji era. Currently, Ninomaru has transformed into the Kawauchi Campus of Tohoku University, and Sannomaru has become the Sendai City Museum.
▶ Why was this location chosen?
After the Battle of Sekigahara, there was a need for a stronghold (mountain castle) to prepare for battles against the Uesugi clan, which was still in opposition to the Tokugawa clan. This led to the selection of Sendai (Aobayama) as a suitable location for building a castle, as it featured hillocks that were "easy to defend and difficult to attack," along with plains that offered prospects for traffic and the development of a castle town.
▶ Location and Area of Sendai Castle
Sendai Castle is located to the west of Sendai City's urban area, with its castle grounds centered on the Aobayama hill and the riverbank terrace of the Hirose River at its foot.
Since 1997, with the commencement of stone wall restoration work in the main keep and archaeological investigations of the Great Hall site, its historical value has been enhanced, and in August 2003 it was designated as a national historic site.
▶ Development of the Castle Town
With the construction of Sendai Castle, the development of the castle town also began. The castle town expanded to the east of the castle, separated by the Hirose River, centered on the Oshu Highway running north-south and the Omachi Street extending east-west. Near the castle were the residences of senior vassals, with merchant towns along the highway, and samurai residences in the surrounding area.