> The design relies on a new smartglass technology that turns the walls opaque when the door is locked.

Which is pretty much exactly what I expected when I heard the words "transparent public toilets."

Perhaps because you didn't read it?

Paragraph 8: > The design relies on a new smartglass technology that turns the walls opaque when the door is locked. “At night, they light up the parks like a beautiful lantern,” according to The Nippon Foundation.

It’s like The Sims in Japan, anytime genitalia comes out, a blur box is generated over top of it like the symbol of the Laughing Man in Ghost in the Shell.

Source: Have been to Tokyo several times

This is explained in the text between the headline and the first line.

The text reads: "Pritker Prize-winning architect Shigeru Ban's transparent public toilets turn opaque when in use."

The technology used is probably something like https://www.smartglassinternational.com/electric-switchable-... which is opaque when unpowered and transparent when powered.

“The design relies on a new smartglass technology that turns the walls opaque when the door is locked.”

Explained in this video. https://youtu.be/xBvzzq3LF_w?t=61

> "You cannot see each other from the outside or inside"

It states in the article that they will turn opaque when occupied.