Diamond Electric Holdings

Diamond Electric Holdings is the corporate entity that now encompasses the operations historically associated with Tabuchi Electric Co. Ltd. The group's website refers to itself as the official site of Diamond Electric Holdings, whose primary operating companies include Diamond Electric Co., Ltd. and Dia Zebra Co., Ltd. The consolidation appears to have absorbed the Tabuchi brand into a broader manufacturing group.

The group is organized around three primary business divisions, called the 'three business spears': Automotive Electronics, Energy Solutions, and Home Electronics. Supporting these are three manufacturing principles focused on quality, people, and supply-chain collaboration. The divisions are supplemented by an internal R&D unit, the Technology Innovation Incubation Room, which develops foundational technologies.

The company's internal Technology Innovation Incubation Room focuses on several core technology platforms. These include environmentally friendly combustion technology, insulated bidirectional power conversion technology, and advanced reactor technology. The group integrates these into products such as residential storage battery systems and a V2X-compatible onboard charger for vehicles.

Yes, Diamond Electric Holdings maintains a dedicated investor-relations section on its website, including financial highlights, an IR library, and disclosures consistent with a publicly listed entity. The site publishes materials such as financial results under Japanese GAAP and notices of annual shareholder meetings, indicating it is a publicly accountable company.

The company has a publicly stated environmental policy and a commitment to decarbonization. It publishes a group CSR management framework and a privacy policy. A recent example of its sustainability-linked financing activity is a May 2026 agreement with The Chugoku Bank for a sustainability-linked loan, signaling a linkage between its funding and ESG targets.