👉 Octarchies are a type of architectural style that originated in Japan. They were popular during the Edo period (1603-1867) and are characterized by their use of a single, straight facade with multiple windows. The name "octarch" comes from the Japanese term "kōkaku," which means "straight." This architectural style is known for its simplicity and functionality, as well as its ability to create a sense of openness and spaciousness in spaces.