"Rion was founded in 1944, with the aim of developing commercial products based on research carried out at the Kobayasi Institute of Physical Research. This public-service institute is dedicated to the study of physics and acoustics. Ever since its founding, Rion has upheld the belief that acoustics is a science of great importance to the well-being and welfare of society. Rion has continued to introduce products based on this philosophy, aimed squarely at improving the quality of life. A healthy and contented society is the vision that guides our activities.
Rion's products are in four main categories: "Hearing Instruments" dealing with hearing aids and equipment for hearing ability training, "Medical Equipment" for the fields of otorhinolaryngology, dermatology, and ophthalmology, "Sound and Vibration Measuring instruments" encompassing sound and vibration level meters, seismometers and related devices, and finally "Particle Counters", mainly equipment for measurement of airborne and liquid-borne particles. "