This actually seems like the kind of nonsense that gets “invented” once a decade or so. There’s just no way this is humanity’s very first crack at “washing machine but it does people” lol

Should’ve looked up on the interwebs before doubting the glorious nation. 💢

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. Fast forward more than half a century, and the company he now leads has given this concept another try.

https://mymodernmet.com/human-washing-machine-science-co/

https://www.core77.com/posts/134471/A-Washing-Machine-for-Human-Beings-from-1970