In March 2015, Gainax established Fukushima Gainax, a new animation studio and museum, in a converted junior high school building in Miharu, Fukushima to take more overseas outsourcing work.

The studio and museum were established to bring more tourism to the area in the wake of the Fukushima nuclear accident in 2011.

[citation needed] In September 2016, the company established a new subsidiary in Tokyo.

[citation needed] In August 2018, it was announced that Fukushima Gainax had been acquired by Kinoshita Group Holdings on July 26, making it Kinoshita's new subsidiary.

Fukushima Gainax changed its studio name to Gaina and relocated to Koganei, Tokyo on August 9, with its new parent company planning to make the new subsidiary a pillar of its anime production to expand its business.