Properties of light emission from a cavitation generated by a circular orifice shear flow have been investigated experimentally. In order to enhance the weak emission from clear water cavitation, xenon gas and luminol were dissolved in the water. The emission intensity was directly measured by an optical system with a photon counter and a spectrometer. It was seen that the emission could be enhanced by more than 100 times, and that the measured spatial profile of emission and its spectrum for xenon-water cavitation were very similar to those for clear water. The spectrum for luminol-water cavitation was a simple superposition of the spectrum from clear water and that due to luminol. The color temperature of emission from xenon-water cavitation was as high as roughly 20 000K.