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FDK Corporation

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Japanese manufacturer of batteries, electronic components, and related energy products.

Last updated August 26, 2026

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Overview

FDK Corporation is a Japanese electronic-components and battery manufacturer headquartered in Tokyo. Its name derives from Fuji Denki Kagaku, the company's former name, and the business has developed from a Fuji-affiliated electrical and chemical manufacturer into a supplier of primary batteries, rechargeable batteries, battery systems, and selected electronic components. FDK operates as a consolidated subsidiary of Fujitsu and has historically sold products under both FDK and Fujitsu-related brands; earlier products were also associated with the FUJI NOVEL name. The company serves consumer, industrial, telecommunications, information-technology, automotive-related, and other equipment markets. Its battery portfolio has included alkaline batteries, nickel-metal hydride rechargeable batteries, lithium primary batteries, coin-type rechargeable batteries, and battery packs or systems. Its electronic-components activities complement its energy products and have included components used in electronic equipment and power-related applications. The company therefore occupies a position between a traditional battery maker and a broader electronic-components supplier rather than functioning solely as a consumer battery label. A major period of portfolio expansion followed Panasonic's acquisition of Sanyo Electric. FDK acquired shares in Sanyo Energy Twicell, which carried on Sanyo's non-automotive nickel-metal hydride battery business, and Sanyo Energy Tottori, which inherited cylindrical lithium primary batteries and coin-type secondary-battery activities. The acquired operations were renamed FDK Twicell and FDK Tottori. FDK later absorbed FDK Twicell in December 2014 and FDK Tottori in October 2016, integrating those operations into the parent company. Some production assets associated with the Washizu and Takasaki plants had earlier histories connected with Toshiba Battery facilities. FDK's business is primarily industrial and business-to-business, although its batteries have also reached consumers through retail channels and Fujitsu-branded battery products. Its relationship with Fujitsu provides access to a large technology and corporate group, while its battery manufacturing heritage gives it specialized capabilities in rechargeable and primary chemistries. The company remains an active Japanese listed manufacturer with operations and customers extending beyond Japan.

History

FDK Corporation traces its identity to Fuji Denki Kagaku, a Japanese electrical and chemical manufacturing business established in 1950. The company developed within the broader Fuji corporate sphere and became associated with the manufacture of batteries, electronic components, and related products. Its earlier commercial identity included the FUJI NOVEL brand, while later products were marketed under the FDK and Fujitsu names. Over time, FDK built expertise in both primary and rechargeable battery technologies. Its activities included alkaline and lithium primary cells, nickel-metal hydride rechargeable batteries, coin-type secondary batteries, and products intended for industrial equipment and electronic devices. The company also maintained an electronic-components business, allowing it to serve equipment manufacturers with more than battery products alone. The restructuring of the Japanese battery industry created an important turning point. When Panasonic acquired Sanyo Electric, parts of Sanyo's battery operations were separated or transferred. FDK acquired shares in Sanyo Energy Twicell, which inherited Sanyo's nickel-metal hydride battery business outside the automotive sector, and in Sanyo Energy Tottori, which inherited cylindrical lithium primary batteries and coin-type secondary-battery activities. On completion of the transactions, the subsidiaries were renamed FDK Twicell and FDK Tottori. The acquisitions strengthened FDK's manufacturing base and broadened its battery portfolio. FDK Twicell was subsequently absorbed by FDK in December 2014, and FDK Tottori was absorbed in October 2016. This consolidation brought the acquired operations more directly into the parent company. The Washizu and Takasaki plants also had historical connections with facilities previously associated with Toshiba Battery, illustrating the movement and consolidation of battery-manufacturing assets among Japanese electronics groups. FDK operates as a consolidated subsidiary of Fujitsu while remaining a publicly traded company. Its products have been sold through FDK and Fujitsu branding, and the business serves Japanese and international customers. In its current form, FDK is best understood as a specialized Japanese manufacturer combining battery chemistry, cell manufacturing, battery-system capabilities, and electronic components. Its corporate role within the Fujitsu Group gives it an industrial technology affiliation, while its historical acquisitions and manufacturing sites provide continuity with Japan's established battery sector.

  • 2016

    FDK Tottori is absorbed

    [1]

    FDK absorbs FDK Tottori in October, consolidating the related cylindrical lithium primary and coin-type secondary-battery activities.

  • 2014

    FDK Twicell is absorbed

    [1]

    FDK absorbs FDK Twicell in December, integrating the non-automotive nickel-metal hydride battery operations into the parent company.

  • 1950

    Fuji Denki Kagaku is established

    [1]

    The company that developed into FDK Corporation is established under the Fuji Denki Kagaku name.

  • Expansion into battery and electronic-component manufacturing

    [1]

    FDK develops a business spanning batteries, electronic components, and related products, with earlier products associated with the FUJI NOVEL brand and later products sold under FDK and Fujitsu brands.

  • Sanyo battery operations join the FDK group

    [1]

    FDK acquires interests in Sanyo Energy Twicell and Sanyo Energy Tottori after Panasonic's acquisition of Sanyo Electric. The operations are renamed FDK Twicell and FDK Tottori.

Products and positioning

A Japanese battery and electronic-components specialist combining primary-cell, rechargeable-battery, battery-system, and component manufacturing with the resources of the Fujitsu Group.

  • Battery products

    Primary batteries

    FDK manufactures primary battery products for applications requiring stored electrical energy without user recharging. The portfolio includes alkaline and lithium primary technologies, serving consumer devices as well as industrial and electronic equipment. The company's primary-cell activities include cylindrical lithium batteries inherited through the former Sanyo Energy Tottori business.

  • Rechargeable batteries

    Nickel-metal hydride rechargeable batteries

    FDK produces nickel-metal hydride rechargeable batteries for equipment and systems requiring repeated charging cycles. These activities were strengthened through the acquisition of the non-automotive nickel-metal hydride business associated with Sanyo Energy Twicell. The business has been integrated into FDK following the absorption of FDK Twicell.

  • Rechargeable batteries

    Coin-type secondary batteries

    FDK's battery portfolio includes coin-type secondary batteries, compact rechargeable cells used in electronic devices and other applications where small form factor and repeated use are important. The activity was among the businesses associated with Sanyo Energy Tottori and was later incorporated into FDK.

  • Energy-storage systems

    Battery packs and systems

    In addition to individual cells, FDK supplies battery packs and related battery-system products for equipment manufacturers and industrial applications. These offerings combine the company's cell technologies with packaging, control, and application-oriented engineering, although the supplied reference material does not identify individual product families.

  • Electronic components

    Electronic components

    FDK also manufactures electronic components alongside its battery business. These products support electronic equipment and power-related applications and reflect the company's original positioning as an electronic and chemical manufacturer rather than a battery-only company. Specific component series are not identified in the supplied reference material.

Brand decisions

  • 2016

    Integrate FDK TottoriM&A

    Background

    FDK Tottori held operations associated with cylindrical lithium primary batteries and coin-type secondary batteries inherited from Sanyo.

    Action taken

    FDK absorbed FDK Tottori in October 2016.

    Aftermath

    The related primary and secondary battery activities were consolidated within FDK.

  • 2014

    Integrate FDK TwicellM&A

    Background

    FDK had acquired the subsidiary holding the former Sanyo non-automotive nickel-metal hydride battery operations.

    Action taken

    FDK absorbed FDK Twicell in December 2014.

    Aftermath

    The nickel-metal hydride operations became more directly integrated into FDK's consolidated battery business.

  • Acquire interests in Sanyo Energy Twicell and Sanyo Energy TottoriM&A

    Background

    Panasonic's acquisition of Sanyo Electric led to the separation of several battery activities. FDK sought to expand its battery capabilities by acquiring interests in the businesses covering non-automotive nickel-metal hydride batteries, cylindrical lithium primary batteries, and coin-type secondary batteries.

    Action taken

    FDK acquired shares in both companies and renamed them FDK Twicell and FDK Tottori.

    Aftermath

    The transactions broadened FDK's battery manufacturing base. FDK Twicell was later absorbed in 2014 and FDK Tottori in 2016.

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