Bathing becomes simpler with the introduction of the human washing machine.

The Human Washing Machine, set to debut at the Osaka Kansai Expo in 2025, promises to revolutionize personal hygiene.

Developed by Osaka-based showerhead manufacturer Science Co., this innovative creation, called the “Mirai Ningen Sentakuki” (Future Human Washing Machine), builds upon a concept first introduced at the 1970 Osaka Kansai Expo. Back then, Sanyo Electric Co. (now Panasonic Holdings Corp.) unveiled the original human washing machine—a futuristic, egg-shaped device that used bubble technology to clean users while providing a massage with plastic balls. This groundbreaking exhibit captivated attendees, including a young Yasuaki Aoyama, whose fascination with the invention inspired him throughout his life.

Now the chairman of Science Co., Aoyama is preparing to unveil a modern version of the human washing machine at the upcoming Expo in April 2025, aiming to honor the legacy of the 1970 model.

While the original used ultrasound technology and large air bubbles for cleaning, the updated version employs microscopic air bubbles for superior cleaning efficiency. It also includes cutting-edge sensors to monitor the user’s pulse and other biological data, enabling precise water temperature adjustments. Additionally, an integrated AI analyzes the user’s emotional state—whether calm or excited—and displays mood-enhancing visuals on the machine’s transparent cover.

Though the new human washing machine has not yet been publicly demonstrated, Science Co. has shared some details about its operation. The cockpit-like device partially fills with warm water once the user is seated, releasing millions of microscopic bubbles to cleanse the body. Aoyama hopes to provide up to 1,000 people the chance to experience this revolutionary technology at the Expo.