Actas Inc. is a Japanese animation studio founded in 1998. It is currently a subsidiary of Bandai Namco Filmworks, which in turn is a subsidiary to Bandai Namco Holdings.

Actas was founded on July 6, 1998, by Hiroshi Katō and Jūtarō Ōba, who previously worked for Tatsunoko Production and Ashi Productions.

Following Katō's death in 2009, Shunpei Maruyama was named the new company president. The studio also had a subsidiary animation studio Karaku, but Actas merged it with the main company in July 2017.

In September 2017, Bandai Visual has announced that it had acquired Actas.

In August 2023, it was announced that former president and animation producer Shunpei Maruyama had died.