See-through public toilets have opened in Tokyo.
Toilet
The loos have opened in two parks in the Japanese capital and use a special glass technology so people can identify whether the toilet is clean and whether there is someone inside.
They also use coloured ''smart glass'' which turns opaque when the toilets are occupied, allowing people to do their business without being watched.
Award-winning architect Shigeru Ban helped design the toilets and a statement on the project's website reads: ''There are two things we worry about when entering a public restroom, especially those located at a park.
''The first is cleanliness, and the second is whether anyone is inside. Using the latest technology, the exterior glass turns opaque when locked.
''This allows users to check the cleanliness and whether anyone is using the toilet from the outside. At night, the facility lights up the park like a beautiful lantern.''
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