But it had not arrived alone.… In October 2026, in a converted warehouse in Tokyo’s Kiyosumi-Shirakawa district, thirty-eight-year-old architect Ren Takahashi stood before a screen displaying a building that did not yet exist. The structure was spectacular. Its exterior was made of translucent panels that adjusted their opacity in response to sunlight. Its heating and cooling systems were optimized by artificial intelligence. Sensors monitored energy consumption, while a digital twin—a continuously updated virtual representation of the physical building—allowed engineers to simulate maintenance problems before they occurred. Ren called it The Next House. His investors called it revolutionary. His younger colleagues called it the future. His father, Masato, who had spent forty-five years as a carpenter, called it a glass box with expensive computers. “You’ve designed a building that can tell you when it’s uncomfortable,” Masato said, ...