Researchers of the National Institute of Advanced Industrial Science and Technology have monitored the CO2 level and crowd density of 5 stadiums of J. League Games by using several sensor devices, including high-resolution cameras and CO2 detectors. They reported the first result of their monitoring of FC Imabari, Montedio Yamagata, Hokkaido Consadole Sapporo, Kawasaki Frontale, and Kashiwa Reysol. These results are expected to contribute to making guidelines for reducing the risk of contracting COVID-19.

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