Nipro, a Japanese glass and medical supplies manufacturer, sold a new instrument named
“Cocoro Meter” that can be used to check your stress level. Jointly developed with Masaki Yamaguchi, associate professor at Toyama University, the Cocoro Meter uses your saliva to predict the person’s stress by measuring the cardinality of digestive enzyme amylase, which is found in human saliva itself. The amount of it will rise when you get stressed. The result will be displayed on four stress levels.

Measures 87 x 130 x 40mm and weighs 190g, the Cocoro Meter device is avaialble for 19,800 yen.

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