Pros: The Osaki 4000 comes in 6 different designs, 6 automatic programs to choose from (Healthcare, Relax, Therapy, Smart, Circulation, Demo), 3 manual modes, and 6 massage styles to choose from. With its full body massage features, it could easily stand in highest price range, but it's still quite affordable product for the amount of features that it offers.
Cons: Although there are 6 different designs to choose from, we didn't find any of them to be very attractive.

The OS-400D is one of the best selling massage chairs from Osaki company. It comes in 6 different designs and features that could satisfy any customer, so make sure you check out the latest pricing info down below if you are interested.

Our Ultimate Osaki OS-4000 Review:

If you are looking for a full body massage chair that stands out in its price range without breaking the bank, the OS-4000 might be one of the those that are worth taking into consideration. Just like every advanced zero gravity chair, it offers fully body massage right from your neck to your feet and it comes with many other advanced features.

The S-track movable intelligent massage robot automatically detects your body type, curves and adjusts all the settings, so you get the best massage possible out of it. Re-calibration every time after another user uses it, is not necessary. The OS-4000 is powered by powerful 11 separate motors and uses 32 multi-layered Air Bags to provide full body massage right from your shoulders and neck to your feet.

Osaki OS-4000


Full List of Features:

6 Different designs – The OS-4000 comes in 6 different designs – Black, White, Brown, Charcoal, Brown-Black and Charcoal-Beige. Although we didn’t find any of them very attractive, that’s a choice of preference and you might find some of them perfect for your apartment.

S-track movable intelligent massage robot precisely detects your body type and adjusts everything so you get the best experience possible, so you don’t have to re-calibrate it every time you use it.

6 auto-programs – The OS-4000 comes with 6 pre-programmed modes (Healthcare, Relax, Therapy, Smart, Circulation and Demo).

3 manual massage programs – If you don’t want a full body treatment, you can easily choose one of other two manual programs (partial and fixed modes).

Wireless Mini-Controller – Osaki is known for their advanced and easy-to-use remote controllers. Forget about opening your eyes and making all kinds of movements every time you want to change the massage program because Osaki remote controller makes it all easier.

3-year limited warranty – 3 years on parts and frame + 1 year on labor, which makes it one of the best in this area.

What’s the price and where to buy it?

The Osaki OS-4000 is quite an expensive massage chair, but there might be some discounts available that make it a good buy in our opinion.

Full List of Technical Specs:

  • S-track movable intelligent massage robot
  • Intelligent 4 Roller System
  • Dimensions – 46” x 32” x 47”
  • Compatibility – Height: 5’2” to 6’4”, Weight: 265 lbs
  • Weight – 215 lbs
  • Weight Capacity – 265 lbs
  • Automatic Programs – 6
  • Massage Types – 6
  • Manual Massage Modes – 3
  • Number of Air Cells – 32
  • Five speed and intensive levels
  • Zero Gravity Design
  • Warranty – 3 years on parts and frame + 1 year on labor


Osaki OS-4000 provides everything you could possibly expect from any top-end zero gravity massage chair. Considering its highly advanced features and 3-year warranty, it just might have the best value for the money.