Choshu Industry (長州産業株式会社) is a manufacturer and distributor of energy systems and device manufacturing equipment. It offers solar power systems, environmental equipment, hydrogen energy and biomass energy equipment, etc. The company also provides design, processing, assembly, installation, and maintenance of equipment for manufacturing organic electroluminescence (EL) devices, semiconductors, and mechatronic equipment, as well as ultraprecision sheet-metal processing and machining of parts.