For centuries, Japan has taken pride in the talents of its craftsmen, carpenters and woodworkers included. Because of that, you might be surprised to find that some Japanese castles have extremely creaky wooden floors that screech and groan with each step.
How could such slipshod construction have been considered acceptable for some of the most powerful figures in Japanese history? The answer is that the sounds weren’t just tolerated, but desired, as the noise-producing floors functioned as Japan’s earliest automated intruder alarm.