Osaki OS-4000 Massage Chair Review: The Definitive Guide

Osaki OS-4000 massage chair
Osaki OS-4000 massage chair

No doubt Osaki OS-4000 massage chair is one of the best selling chairs of all time.

But in the end, there is only one question:

Is Osaki OS-4000 the right chair for you?

To those of you who don’t know, benefits of massage chairs are vast.

Due to the application of sophisticated technology in today’s massage chairs, you can experience a near-human massage from them.

And, Osaki OS-4000 massage chair is one that has truly been a revolution in the world of massage chairs.

Today, in this article, we are going to discuss everything there’s to know about this massage chair.

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  • Full body massage with 48 airbags and advanced rollers.
  • Automated body scan.
  • Ergonomic S-track movement.
  • Multiple zero gravity positions.
  • Auto preset modes and manual overrides.
  • Suits perfectly for all homes.
  • Hard application of airbags placed to massage your calves.
  • Huge and heavy.
  • Not best for people above 6 feet weighing 200 pounds or more.


Let’s start with measurements:

Osaki OS-4000 weighs around 230 pounds with dimensions 47 x 32.5 x 46 inches.

Like other massage chairs, it’s heavy.

What’s the downside?

  1. It takes a considerable amount of room space and since it’s heavy, you might even need to break it down to carry it to your desired spot in the house.Comforting part is: You don’t have to move it around too often.
  2. While this chair has been designed for average American size, most reviewers comment otherwise.If you’re anything over 6 feet, and weigh say-200 pounds or more, it probably won’t be the best massage chair for you.

Heated full-body massage with 48 airbags and advanced rollers

The Osaki OS-4000 massage chair doesn’t simply offer a lower or upper back massage, but works it’s magic all over your body.

To be specific:

It works on your upper body regions – neck, shoulder, back and lumbar, and your lower body regions – buttock, thighs, calves and feet.

It also features a hybrid massage technology. where roller heads and air bags work in unison to provide you with the best massage throughout your body.

Cushions 48 Airbags

Osaki OS-4000 massage chair air bags
Osaki OS-4000 massage chair air bags

Airbags, airbags everywhere!

Specifically, 14 air bags in the feet region, 10 for your calves, 8 in your hand region, 6 for your buttocks, 2 for shoulders, 2 in the neck and another 6 in the hips.

The compression of these airbags pushes through your skin to hit the right spots all over your body to provide you with a relaxing massage.

What’s the downside?

Many reviewers have complained about the air bags placed to massage your calves.

They will squeeze so hard to the point where you get bruises and feel like you’re about to burst.

And this isn’t just a problem for people with bigger calves.
What can you do is: Since it comes with the custom massage program, you can always opt to ignore calves massage.

Quad styled Advanced rollers

The quad styled advanced rollers (two on top and two on bottom) featured on this massage chair can knead and squeeze like a human hand.

And, you can program these rollers in three different levels of strength density and five levels of speed density.

Heated therapy

With the added benefit of the heat sessions offered by this massage chair, you can numb down your pain and relax your body relieving you of your everyday stress.

Even better: This feature can be very beneficial during the cold winters.

Personalization with automated body scan
Osaki OS-4000 massage chair

Before actually giving you a relaxing massage, the massage chair inspects your body for stress points.

It actually adjusts the movement of its rollers to suit the natural curvature of your body.

Likewise, it customizes its height and width to match yours so as to perfectly align the chair for better massage experience.

Experience near-weightlessness with zero gravity

Osaki OS-4000 massage chair features zero gravity.

Zero gravity allows you to rest your body in a least gravitational influenced position, where your feet is aligned above with your heart.

This position allows your vertebrae to rest reducing the strain while increasing blood circulation in your body.

Best of all: Osaki OS-4000 offers two zero gravity settings.

Supports your spinal curve with S track

S track in massage chairsIt features something called an S-track movement.

This refers to the movement of the roller heads within the chair in an S shape.

Why S shape?

Your spine is S shaped and the chair is designed in a way that it perfectly supports this shape of your spinal curve.

And, the movement of roller heads in the same shape provides you just the right amount of massage on your neck, shoulder, and adjusts itself for lumbar (lower back) massage.

6 unique Auto-programs

Healthcare, Relax, Therapy, Smart, Circulation and Demo. These are the six preset massage programs incorporated in the chair.

So basically, you don’t need to bother with setting the massage combinations for say- your neck, mid back, lumbar, calves, or lower back.

You can simply opt from one of the many preset programs to choose the suitable massage type for your body.

Moreover, you can manually set the combinations ignoring these preset auto programs.

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Comfort of a high-end leather

Simply stated: To understand the quality of a high-end leather, you need to experience the cheaper leathers.

The high-quality leather in this chair doesn’t let you sink-in the chair, nor does it let you feel any sort of harsh skin against your fragile body.

Complements the style of your room

Osaki OS-4000 massage chair colors
Osaki OS-4000 massage chair colors

Features aren’t the only characteristics that make this product worth buying.

It is designed with an uncompromising attention to details so as to make it compatible with most home decors.

You can choose from an array of colors, such as chocolate brown, full black, and a few more.

  • OS-4000A = Black/Beige
  • OS-4000B = Brown/Black
  • OS-4000C = Cream/Brown
  • OS-4000D = Charcoal/Beige

What else has this chair got?

There are some common features that are almost mandatorily available in most massage chairs in the category.

Massage chair methods

  • Six methods of massage: rolling, kneading, tapping, clapping, shiatsu, swedish
  • Five levels of speed, intensity and three kinds of adjustable width
  • Auto-timer with 5 – 30 minute programming options
  • 3-year warranty is provided by the company which includes full coverage of all parts and labor for 1 year, 2nd and 3rd year parts.
  • Along with the product, you also get a LCD display monitor which allows you to witness the parts of your body being massaged. A mini wireless controller included in the package is a plus.

Alternatives to Osaki OS-4000 massage chair

It goes without saying that the Osaki OS-4000 isn’t the only quality massage chair on the market.

Osaki OS-4000 can be considered to be somewhat mid-range massage chair as there are therapy chairs below and above the price range of the product.

Expensive Alternative

Inada Sogno Dreamwave Massage Chair, Red.

This Japanese massage chair will blow a sizable hole in your pocket.

But, the features like dreamwave technology, high quality airbags, leather material, and uncompromising attention paid to the details makes this chair a complete massage chair for you. i.e, if you can afford it.

Cheaper Alternative

Kahuna M-6800 Massage Chair.

At about a thousand bucks less than the Osaki OS-4000 massage chair, you’ll hardly find any product better than this.

But with the cheaper price tag comes few compromises regarding comfort and durability.

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The Osaki OS 4000 massage chair is a decent looking chair packed with features to make your massage experience comforting.

I hope you learned about the features, pros and cons of the Osaki 4000.

One more thing to remember is that it is only recommended that the product be used for 30 minutes at a time, for the sake of your health and the machine’s.

If the size of the machine isn’t a con for you and you can do without the calves massage, the Osaki massage chair is perfect for you. It offers great value for money.

My verdict: 4.2 out of 5 stars.

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