At night, the restrooms’ vibrant hues light up the public parks like a lantern, helpful given their placement in Shibuya, one of the busiest commercial areas of Tokyo. Philip Fong-AFP/Getty ...

Shibuya had retired from the U.S. Air Force and was contemplating a second career as a commercial pilot. “I didn’t want to see the business close,” Calvin Shibuya said. He told the brothers ...