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Group TAC was a Japanese animation and computer-graphics studio active from 1968 until its bankruptcy and liquidation in 2010.

Last updated August 25, 2026

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Overview

Group TAC Co., Ltd. was a Japanese animation and computer-graphics production studio based in Shibuya, Tokyo. Established in 1968 by staff who had formerly worked at Mushi Production, the company became involved in a broad range of audiovisual work, including animated films, television programs, video productions, and commercials. Its activities extended beyond animation drawing and production management: the studio was also associated with planning, production coordination, sound effects, and other parts of the production process. The company operated as a vertically involved creative and production organization rather than only as a narrowly defined animation subcontractor. Its work covered multiple formats and client or project requirements, allowing it to participate in theatrical, broadcast, home-video, and advertising production. This breadth placed Group TAC within Japan's wider commercial animation and media-production sector during a period when animation studios increasingly worked across television, film, video, and advertising. Atsumi Tashiro served as the company's head for much of its history. His death in July 2010 preceded a rapid deterioration in the company's position. In September 2010, Group TAC filed for bankruptcy, after which its assets were liquidated. The bankruptcy marked the end of Group TAC as an operating studio. Some creative and production activity associated with the company continued elsewhere: Diomedéa was formed following a split from Group TAC, while the unfinished or remaining animation project Hana Kappa was taken over by OLM, Inc. and XEBEC. Group TAC is therefore best understood historically as a defunct Japanese animation and computer-graphics studio whose legacy continued through successor or receiving production organizations.

History

Group TAC was founded in 1968 in Japan by former staff members of Mushi Production, one of the influential animation companies associated with the development of modern Japanese television animation. The new company was established as an independent animation and audiovisual-production organization and was located in Shibuya, Tokyo. Its formation connected Group TAC to an experienced professional network while allowing it to develop its own production activities. Over the course of its existence, Group TAC worked across several areas of Japanese visual media. The studio was involved in animated films, television programs, video productions, and commercials. Its role was not limited to a single production stage. Descriptions of the company identify work in planning, animation production, sound effects, and related parts of the overall production process. This range suggests a studio structure capable of participating in projects from early development through technical and post-production work. Group TAC's business reflected the diversification of Japan's animation industry during the late twentieth and early twenty-first centuries. Animation studios increasingly operated across theatrical releases, television broadcasting, direct-to-video material, advertising, and computer-generated imagery. Group TAC likewise combined conventional animation activity with computer-graphics work and commercial production. The available historical record does not provide a complete project-by-project chronology, but it identifies the studio as a contributor to multiple forms of animated and audiovisual content. Atsumi Tashiro was the company's head until his death in July 2010. His death occurred during the final period of Group TAC's existence. In September 2010, the company filed for bankruptcy and liquidated all of its assets. The filing and liquidation ended Group TAC as a functioning corporate studio and explain its present classification as defunct. The company's closure did not mean that every associated production immediately disappeared. Diomedéa was formed after a split from Group TAC, providing one institutional continuation connected to the former studio. In addition, Group TAC's remaining animation project, Hana Kappa, was taken over by OLM, Inc. and XEBEC. These developments transferred personnel, production responsibilities, or project continuity to other animation companies. Group TAC's historical importance therefore includes both its own body of audiovisual work and the later redistribution of its creative and production activities. Because the surviving reference material gives limited detail about individual productions, financial performance, ownership structure, and the identities of its founders, those details are not expanded here. The clearest documented account presents Group TAC as a Tokyo-based Japanese animation and computer-graphics studio founded in 1968, led for many years by Atsumi Tashiro, and dissolved after bankruptcy in 2010.

  • 2010

    Atsumi Tashiro dies

    [1]

    Atsumi Tashiro, who had headed Group TAC, dies in July.

  • 2010

    Bankruptcy and liquidation

    [1]

    Group TAC files for bankruptcy in September and liquidates its assets.

  • 2010

    Remaining project transferred

    [1]

    OLM, Inc. and XEBEC take over the remaining Hana Kappa animation project.

  • 1968

    Group TAC is founded

    [1]

    Former Mushi Production staff establish Group TAC in Japan.

Products and positioning

A Japanese animation and computer-graphics studio with capabilities spanning planning, production, audiovisual post-production, television, film, video, and commercial work.

  • Film production

    Animated films

    Group TAC participated in the production of animated films as part of its broader studio activity. The available reference material does not identify a complete filmography or provide sufficient details for individual titles, so this entry describes the documented production category rather than assigning specific films to the company.

  • Television production

    Television animation

    Television programs formed one of Group TAC's documented areas of work. The studio contributed to animated and audiovisual television production, although the supplied reference does not provide a full list of programs or precise credits for individual series.

  • Video production

    Video productions

    Group TAC also worked on video productions, reflecting the studio's involvement beyond theatrical and broadcast animation. The available sources do not specify whether particular projects were original productions, contracted work, or releases in a specific home-video format.

  • Computer graphics

    Computer-graphics production

    Computer graphics were part of Group TAC's production capabilities. The company combined computer-graphics work with animation and other audiovisual services, but the supplied sources do not identify particular software systems, titles, or technical specialties.

  • Advertising production

    Commercials

    Group TAC produced or contributed to commercials, extending its animation and computer-graphics expertise into advertising. No specific campaigns, clients, or markets are identified in the available reference material.

  • Animation project

    Hana Kappa

    Hana Kappa was the remaining animation project associated with Group TAC at the time of its 2010 collapse. After the company filed for bankruptcy, responsibility for the project was taken over by OLM, Inc. and XEBEC.

Brand decisions

  • 2010

    File for bankruptcy and liquidate the companyOther

    Background

    After the death of long-time head Atsumi Tashiro in July 2010, Group TAC entered bankruptcy proceedings in September of the same year.

    Action taken

    The company filed for bankruptcy and liquidated all of its assets.

    Aftermath

    Group TAC ceased operating as a studio. Diomedéa was formed after a split from the company, and the remaining Hana Kappa project moved to OLM, Inc. and XEBEC.

  • 2010

    Transfer the remaining Hana Kappa projectOther

    Background

    Group TAC's closure left an animation project requiring continuation under other production organizations.

    Action taken

    OLM, Inc. and XEBEC took over Hana Kappa.

    Aftermath

    Production continuity for the project moved outside Group TAC after the company's bankruptcy and liquidation.

Sources2 sources

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