is a Japanese animation studio established on October 4, 1978. It is noted for animated series including Spirit of Wonder, Absolute Boy, ', and several others, including the long-running NHK series Nintama Rantarà Â. Its name can be translated as "Hall of Asia."
The studio was founded in 1978 by the noted animators Tsutomu Shibayama, Osamu Kobayashi and Michishiro Yamada, former members of the animation studio A Production, under the corporate title . The name Ajiadà  is a penname used by Tsutomu Shibayama and Osamu Kobayashi.
In 1985, it formally became a kabushiki gaisha (business corporation). In 1987, it produced its first series, the OVA . It established the company in 1990.
At the same time, they established a joint venture company, , with the toy company Takara. They undertook the production of anime such as Miracle Girls and also engaged in subcontracting for other anime productions sponsored by the company (later dissolved). In 1998, the studio established a digital animation division to produce its digital animation.
In 2005, the studio produced Zettai Shà Ânen, which was directed by Tomomi Mochizuki and premiered on NHK BS2. In 2007, it produced Emma â A Victorian Romance: Second Act, the second season of Emma â A Victorian Romance.