It appears (and certainly makes for a more heart-wrenching story!) that the first robotic chair was dreamed up back in 1945 by Niichi Kawahara of Japan. After five years of experimentation, he came out with the first working model in 1950.
Niichi's youngest daughter, Kazumi, suffered severely from Myofascial pain syndrome in her shoulder muscles or, in layman's terms, "knotty" shoulders. Daily, Niichi and his wife used to massage their daughter's shoulders in a concerted effort to relieve her pain. They then had a "lightbulb moment" and created an automation that Kazumi could use herself when her parents were at work.
Kawahara was a factory manager specialising in sewing machine parts. His first model was inspired by the technology he had gained through his employment. It mattered not that the chair's design couldn't have been any more basic, vertical and somewhat uncomfortable without any cushioning, not least it was handmade of floorboards. His automation managed to home in on the exact trigger points causing Kazumi so much pain, and she was able, for the first time, to leave the house and play with friends.
Please check out this wonderfully old video of Kazumi speaking about her father's quest to ease her suffering and see the invention still in use today!
Bathhouses have been around since Roman times in one form or another, and they have been very popular for hundreds of years in Japan. During the early 1950s, the owner of a very popular Japanese bathhouse, Mr Tomoyuki Nakae, came across Niichi's invention and viewed it as what could turn out to be a very profitable addition to his income insofar that his clients often came to his bathhouse not just for steam treatments, but for massages. As he did not have enough masseuses to cope with the demand, Mr Nakae added these units in the bathhouse and allowed each bather a three-minute session.Nakae was also an amateur inventor and teamed up with Niichi to produce a more efficient version and even one that was coin-operated. These eventually found their way into hundreds of bathhouses all over the country.