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In Japan, some public toilets are made with transparent glass walls that instantly turn opaque when the door is locked — blending futuristic design with hygiene and safety. Located in places like Tokyo’s Shibuya district, these smart restrooms allow passersby to see that the facility is clean and empty before entering.
Once inside, electrochromic technology is activated, frosting the glass for complete privacy. The concept addresses two major concerns with public restrooms — cleanliness and security — while also becoming an architectural attraction. Designed by renowned architects as part of the Tokyo Toilet Project, these facilities are brightly lit, accessible, and regularly maintained.
This innovative approach not only enhances public trust in hygiene but also makes urban spaces more inviting and safe.