Best known for their impeccable musical performances and their beautiful long legs, Girls' Generation has achieved tremendous success in Japan within an amazingly short period of time. Before the girls go on their first Japanese four-city concert tour in May 2011, they're releasing their third Japanese-language single Mr. Taxi/Run Devil Run. After releasing two Japanese covers of their Korean-language hits, the girls are finally delivering their first original single for their Japanese fans. The single's other A-side track, the Japanese cover of their Korean-language hit Run Devil Run, is already a hit on the Japanese mobile download charts!

Limited Pressing Edition includes an exclusive Limited Edition photobook that is different from the Deluxe Edition photobook. It also comes with a DVD with the Run Devil Run music video.