Hioki E.E. Corporation, set up in 1935 by Mizo Hioki in Tokyo, Japan, is a global leader in electrical test and measurement instruments. Headquartered in Ueda, Nagano, it supplies over 200 products, such as power analyzers (PW8001), resistance meters (RM3545A), and data loggers (LR8450), serving industries like automotive, aerospace, railways, and renewables. Operating in 10 countries with subsidiaries like Hioki India (2019), Hioki employs ~1,000 people and invests ~10% of revenue in R&D at its Hioki Innovation Center. Publicly listed (TSE: 6866), it emphasizes safety, quality, and sustainability, achieving 100% renewable energy at its head office plant in 2021 and setting circular economy targets in 2025. Recent innovations include the FA1823 Flying Probe Tester for IC substrates and the ALDAS-Mini for electrolysis cell analysis.