Diomedéa, Inc. (Japanese: 株式会社ディオメディア, Hepburn: Kabushiki-gaisha Diomedia), previously known as Studio Barcelona (Japanese: 有限会社スタジオバルセロナ, Hepburn: Yūgen gaisha Sutajio Baruserona), is a Japanese animation studio located in Nerima, Tokyo, Japan.

The company was founded on November 28, 2007, following an earlier foundation of its predecessor Studio Barcelona on October 5, 2005.

Studio Barcelona was founded on October 5, 2005, by Nobuyuki Suga following a split from Group TAC.

Following unknown circumstances, the company technically went defunct and was recreated as Diomedéa by Makoto Kohara, who was previously an employee of Studio Barcelona, on November 28, 2007.

Between 2018 and 2020, Diomedéa collaborated with Studio Blanc under the brand name Ezóla.