CHEST M.I., INC. is a Japanese company founded in 1965 and based in Tokyo. Specialising in respiratory technology, it designs and manufactures a comprehensive range of equipment for the diagnosis and monitoring of lung function. Its offering includes spirometers, forced oscillation technique (FOT) devices, as well as polysomnography, ventilation, oxygen concentration and CPAP (continuous positive airway pressure) treatment systems. Recognised for its technical expertise and commitment to innovation, CHEST M.I., INC. is a major player in respiratory healthcare in Japan and internationally.