HIOKI E.E. CORPORATION
Hioki
HIOKI E.E. CORPORATION is a Japanese manufacturer of electrical measuring instruments, founded in June 1935 and headquartered at 81 Koizumi in the city of Ueda, Nagano Prefecture. The company designs, manufactures and services test and measurement equipment for engineers who need to know exactly how much current flows, how much resistance a cell develops, or how clean a power supply is. Hioki is listed on the Tokyo Stock Exchange Prime Market under ticker 6866 and reported net sales of JPY 40.53 billion in the fiscal year ended December 31, 2025, with operating profit of JPY 6.79 billion and net income of JPY 5.46 billion.
Its reputation rests above all on measuring electrical energy and batteries. Hioki's battery instruments read the internal resistance and open-circuit voltage of cells, modules and complete packs simultaneously, which is how battery makers decide whether a unit is good enough to ship. The family spans the BT3554-50 Battery Tester, the BT3562A, BT3563A and BT3564 Battery HiTesters for pack and module testing, and the higher-frequency BT4560, BT6065 and BT6075 instruments used on low-resistance cells. Demand tracks the electric-vehicle and stationary energy-storage industries, and Hioki again named the battery market a growth driver.
The second franchise is power measurement: power meters and analyzers, power quality analyzers and loggers, wide-band current probes and sensors. These instruments certify inverter and motor efficiency, audit power quality in factories and substations, and increasingly validate the power infrastructure inside data centres. Hioki also builds LCR meters and impedance analyzers, insulation resistance meters and megohmmeters, electrical safety testers, digital multimeters, clamp meters, signal calibrators, multichannel data loggers and recorders, and bare-board testing systems, offering more than 300 product models and roughly 1,100 industrial property rights.
Manufacturing is almost entirely Japanese. All three production facilities sit in Nagano Prefecture: the Head Office Factory on the Hioki Forest Hills campus in Ueda, the Ueda Factory II established in 2024 in the Nikoda district of Ueda, and the Sakaki Factory established in 2021 in Sakaki-machi. Hioki has said it is optimising these plants to hold enough capacity for at least JPY 50 billion in consolidated sales, a level it approached in 2025 and expects to pass in 2026.
Hioki sells into more than 80 countries through 11 overseas subsidiaries and a distributor network, with overseas sales at 63.6% of revenue as of December 2025. The group includes Hioki USA, Hioki (Shanghai) Measurement Technologies, Hioki Singapore, Hioki Korea, Hioki India, Hioki Europe GmbH, Hioki Taiwan, PT Hioki Electric Indonesia, Hioki Electric (Thailand), Hioki MEA FZCO in Dubai and Hioki Electric Vietnam. Hioki spends about 14.0% of sales on R&D, and roughly one employee in three is an R&D engineer.
What distinguishes Hioki is a narrow technical focus combined with deep vertical integration. Rather than competing across industrial electronics generally, it concentrates on the measurement chain from sensor to instrument, keeping design, manufacturing, calibration and service in-house. That is why its published targets centre on lifting the overseas operating margin above 20% and the overseas sales ratio to 70% or more under its long-term policy, Vision 2030.
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HIOKI E.E. CORPORATION is a Japanese manufacturer of electrical measuring instruments, founded in June 1935 and headquartered at 81 Koizumi in the city of Ueda, Nagano Prefecture. The company designs, manufactures and services test and measurement equipment for engineers who need to know exactly how much current flows, how much resistance a cell develops, or how clean a power supply is. Hioki is listed on the Tokyo Stock Exchange Prime Market under ticker 6866 and reported net sales of JPY 40.53 billion in the fiscal year ended December 31, 2025, with operating profit of JPY 6.79 billion and net income of JPY 5.46 billion.
Its reputation rests above all on measuring electrical energy and batteries. Hioki's battery instruments read the internal resistance and open-circuit voltage of cells, modules and complete packs simultaneously, which is how battery makers decide whether a unit is good enough to ship. The family spans the BT3554-50 Battery Tester, the BT3562A, BT3563A and BT3564 Battery HiTesters for pack and module testing, and the higher-frequency BT4560, BT6065 and BT6075 instruments used on low-resistance cells. Demand tracks the electric-vehicle and stationary energy-storage industries, and Hioki again named the battery market a growth driver.
The second franchise is power measurement: power meters and analyzers, power quality analyzers and loggers, wide-band current probes and sensors. These instruments certify inverter and motor efficiency, audit power quality in factories and substations, and increasingly validate the power infrastructure inside data centres. Hioki also builds LCR meters and impedance analyzers, insulation resistance meters and megohmmeters, electrical safety testers, digital multimeters, clamp meters, signal calibrators, multichannel data loggers and recorders, and bare-board testing systems, offering more than 300 product models and roughly 1,100 industrial property rights.
Manufacturing is almost entirely Japanese. All three production facilities sit in Nagano Prefecture: the Head Office Factory on the Hioki Forest Hills campus in Ueda, the Ueda Factory II established in 2024 in the Nikoda district of Ueda, and the Sakaki Factory established in 2021 in Sakaki-machi. Hioki has said it is optimising these plants to hold enough capacity for at least JPY 50 billion in consolidated sales, a level it approached in 2025 and expects to pass in 2026.
Hioki sells into more than 80 countries through 11 overseas subsidiaries and a distributor network, with overseas sales at 63.6% of revenue as of December 2025. The group includes Hioki USA, Hioki (Shanghai) Measurement Technologies, Hioki Singapore, Hioki Korea, Hioki India, Hioki Europe GmbH, Hioki Taiwan, PT Hioki Electric Indonesia, Hioki Electric (Thailand), Hioki MEA FZCO in Dubai and Hioki Electric Vietnam. Hioki spends about 14.0% of sales on R&D, and roughly one employee in three is an R&D engineer.
What distinguishes Hioki is a narrow technical focus combined with deep vertical integration. Rather than competing across industrial electronics generally, it concentrates on the measurement chain from sensor to instrument, keeping design, manufacturing, calibration and service in-house. That is why its published targets centre on lifting the overseas operating margin above 20% and the overseas sales ratio to 70% or more under its long-term policy, Vision 2030.
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Quick Facts
Headquarters
Ueda, Nagano, Japan
Founded
1935
Employees
1,153
Revenue
JPY 40.53 billion (FY2025, fiscal year ended December 31, 2025)
Factories
Hioki manufactures at three plants, all in Nagano Prefecture, Japan: the Head Office Factory in Ueda, the Ueda Factory II established in 2024 in the Nikoda district of Ueda, and the Sakaki Factory established in 2021 in Sakaki-machi.
Listing
TYO: 6866
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This corporate profile is compiled from publicly available sources including company annual reports, SEC/regulatory filings, official press releases, and verified third-party industry databases. Financial figures reflect the most recent fiscal year disclosures and are cross-validated across multiple independent references.
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Key references: Official Website TYO: 6866 , Hioki Company Profile · Hioki at a Glance · Group Companies and Plants · Corporate History · IR Financial Data · Denpa Shimbun FY2025 Results · S&P Global Financial Data