HORIBA, Ltd. manufactures and sells instruments and systems worldwide. It operates in five segments: Automotive, Process & Environmental, Medical-Diagnostic, Semiconductors, and Scientific. The Automotive segment offers automotive emission analyzers, onboard emission measurement systems, driveline test systems, engine test and fuel cell test systems, and battery test systems; test systems for engines, chassis, powertrains, brakes, and catalysts, as well as water electrolysis cell/stack assessment equipment; and vehicle development engineering and testing engineering services, as well as leases and manages research and development facilities.

The Process & Environmental segment provides stack gas analyzers, industrial water quality analyzers, water quality analysis and examination systems, air pollution analyzers, environmental radiation meters, and process measurement equipment. The Medical-Diagnostic segment offers hematology and CRP, immunology, clinical chemistry, and blood glucose analyzers, as well as coagulation/hemostasis analyzers. The Semiconductor Instruments & Systems segment provides mass flow controllers, chemical concentration monitors, reticle/mask particle detection systems, residual gas analyzers, and vaporizers.

The Scientific segment offers Raman spectrometers, pH meters, particle-size distribution analyzers, X-Ray fluorescence analyzers, elemental analyzers, fluorescence spectroscopy/fluorescence lifetime spectroscopy, optical components, spectrometers and detectors, and gratings. The company's products are used in arts, entertainment, and recreation; education, research and development, and government institution; food and beverage; energy and environment; health care; industrials; information technology; water; materials; mobility and transport; and waste management applications. HORIBA, Ltd. was founded in 1945 and is headquartered in Kyoto, Japan.