Japanese commuter trains are a hotbed of portable technology, with staid passengers using video games, cell phones, and music players to pass the time on what can be very long trips at peak hours. You’ll also find plenty of people attempting to use their commute as time to catch up on sleep—a risky game that could easily lead to a costly missed stop.

Capitalizing on those cat napping opportunities is the goal of Japanese inventor Pyocotan, who has developed a prototype version of an advanced sleep mask for train travelers. The mask, called “Noriko-san,” is designed to allow commuters a greater peace of mind while sleeping, through the use of a scrolling digital display that’s designed to alert fellow passengers of one’s final destination.

In this video, Pyocotan does a test run of Noriko-san on Tokyo’s Yamanote line, programming the device to read “I will get off a Mejiro station.” The inventor admits that his sleep mask isn’t yet 100 percent effective—his test doesn’t exactly go off without a hitch—but has great hope for the product as the public becomes more aware of what it is. 

+ YouTube