Rakuten Mobile Park Miyagi , officially Miyagi Baseball Stadium, is a baseball stadium in Miyaginohara Sports Park in Sendai, Miyagi Prefecture, Japan. The 30,508-seat park is owned by the prefecture and operated by Rakuten, which has used it as the home field for the Tohoku Rakuten Golden Eagles of Nippon Professional Baseball (NPB) since 2005. Its symmetrical playing surface is the only natural turf field in the Pacific League (PL). An amusement park, Smile Glico Park, is integrated into the stadium's left field seating and features a Ferris wheel.

Sendai is the capital city of Miyagi Prefecture, the largest city in the Tōhoku region. As of 1 August 2023, the city had a population of 1,098,335 in 539,698 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 City of Trees ; there are Japanese zelkova trees lining many of the main thoroughfares such as Jōzenji Street and Aoba Street . 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 Pageant of Starlight , lasting through most of December. The city is also home to Tohoku University, consistently ranked amongst the top institutions of higher education in Japan. On 11 March 2011, coastal areas of the city suffered catastrophic damage from a magnitude 9.0 offshore earthquake, which triggered a destructive tsunami.