Hioki (Hioki E.E. Corporation) is a Japan-based manufacturer specializing in high-precision electrical measuring instruments used in industrial, laboratory, and energy applications. Headquartered in Nagano, Japan, the company is known for producing reliable test equipment such as digital multimeters, clamp meters, insulation testers, data loggers, and advanced power analyzers designed to measure voltage, current, resistance, and overall power performance. Hioki is especially recognized for its strong presence in modern growth areas like EV and battery testing, renewable energy systems, and power electronics. Its instruments are widely used by engineers and technicians for tasks such as efficiency measurement, inverter and motor analysis, battery diagnostics, and electrical safety testing, making the brand a trusted name in both industrial production and R&D environments.