The Osaki Japan Premium 4D massage chair is one of the latest releases from Osaki and is designed, engineered and manufactured in Japan. The Osaki Japan Premium 4D is manufactured by Fuji Medical (Fujiiryoki Japan) and is the same massage chair as their best selling EC-3900 model in Japan. Fuji Medical is the pioneer of the massage chair and invented it back in 1954. The Osaki Japan model features Fuji?s patented Super Mechanism Technology and superior quality, which makes the Osaki Japan Premium 4D one of the best massage chairs on the market today.