Japan’s Innovative “Human Washing Machine” Can Clean up and Dry a Person in 15 Minutes
In 1970, a peculiar invention made waves at the Japan World Exposition, a world’s fair devoted to “Progress and Harmony for Mankind.” The Ultrasonic Bath, created by Sanyo Electric Co.—the modern Panasonic Holdings Corp—was described as a “human washing machine,” and symbolized the future of hygiene. While it never took off commercially, the invention was stuck in the mind of a fourth-grader named Yasuaki Aoyama.













































































