Explaining on Instagram: "Follow (us) @Explaining to learn something NEW every day 🧠💫 In Tokyo’s Shibuya district, architect Shigeru Ban designed cutting‑edge public bathrooms as part of the Tokyo Toilet Project by the Nippon Foundation and Shibuya City government. These toilet cubicles have transparent, tinted glass walls — so you can see from the outside whether they’re clean and free — until the door is locked from the inside. Locking the door cuts the electrical current to the electrochrom