Review of Osaki OS-4000 Massage Chair

Welcome to the review of the Osaki OS-4000 massage chair!

Choosing a massage chair can be quite a challenge. With the multitude of brands, models, and features available on the market, you’d feel overwhelmed almost instantly.

One of the most reputable manufacturers of massage chairs is Osaki.

Their OS-4000 model has been on the market for over a decade with extremely popular feedback. If you’re looking for an affordable, reliable massage chair that provides a soothing massage without all the bells and whistles, the OS-4000 might be the chair for you.

This article will take a deep dive into the features, pros and cons of the Osaki OS-4000 so you can decide if it’s worth purchasing.

But first, let’s discuss who Osaki are as a company.

Osaki: The Manufacturer

The Osaki brand of massage chairs is one of the largest manufacturers and distributors of massage chairs in the USA and Canada.

While the name Osaki may sound Japanese, the brand isn’t from Japan and is actually based in the US. The chairs are made in the USA and sold only in North America.

Osaki OS-4000 Massage Chair Specifications

osaki os 4000 dimensions

To ensure you’re getting the perfect massage chair, you first need to know certain details about it. This will ensure that the chair you’re eyeing will fit your body properly.

The Osaki OS-4000 has a 47-inch upright height, 32” width, 57” length when upright, and 72” length when reclining. 

This massage chair weighs 214 pounds.

It is suitable for users up to 6’4″ tall and weighing up to 264 pounds.

Osaki OS-4000 Features

Osaki OS 4000 Massage Chair Image


Now, the features are the exciting part of the OS-4000 massage chair.

Below are some of its best:

Zero Gravity Function

The zero-gravity function took its inspiration from NASA.

This is the technology that lets your body recline in a neutral position with your feet higher than your heart level.

This not only takes the pressure off the base of your spine, helping to reduce back pain, but it also stimulates circulation.

The OS-4000 offers two stages of this feature, the second one being more reclined than the first, so you can choose the level that you’re most comfortable with.

True Ergonomic S-Track

The OS-4000 is ergonomically designed to adapt to a variety of spine shapes and sizes.

The S-track system lets the chair’s roller heads massage your back from the neck down to your lower spine.

It provides consistent pressure to reduce the risk of injuries or harm while giving you a comfortable massage session.

Body and Leg Scanner

Equipped with the latest technology in body scanning, the OS-4000 will map out your back curvature to give you massages that hit the areas of your body where it needs it the most.

This massage chair also has a leg scanner that automatically adjusts the foot and calf massager to give the best massage to your legs.

Heat Therapy

Another noteworthy feature of the OS-4000 is its heat therapy function.

This massage chair comes with two heating pads located in the lower back region to provide soothing massages.

This heat function is especially beneficial for those who suffer from a stiff lower back as it helps to reduce aches and pains.

Air Body Massages

With the use of innovation and advanced engineering technologies, the OS-4000 can give you full-body air massages aided by 41 airbags.

It has strategically placed airbag massagers for your arms, shoulders, calves, feet, and lumbar region.

This means that pretty much every part of your body can be massaged.

Multiple Massage Programs

The OS-4000 can give you a wide range of massage types:

  • Swedish
  • Shiatsu
  • Kneading

It also allows you to enjoy rolling, tapping, and a combination of these. 

Extendable Footrest

Before you start with your massage, the chair will extend its footrest and retract according to your size.

You just need to press it firmly with your toes to make it stop.

Speed and Intensity Level Controls

With five levels of intensity and five speeds, the OS-4000 lets you specify the massage that you want as you have total control of its rollers and massagers.

Other Features

In addition to the features mentioned above, the OS-4000 has many other features that make it a worthwhile investment:

  • Automatic timer
  • Two remote wireless controllers
  • Spring-loaded ottoman
  • Spinning foot rollers
  • USB port


Osaki OS-4000 Massage Chair: The Pros

Here’s what to like about the OS-4000 massage chair:

  • Equipped with a vibrating seat to target the thigh area
  • Has multiple massage programs for customized massages
  • Comes with adjustable widths and automatic adjustments
  • Great at relieving aches and pains
  • Durable enough to be used by the whole family

Osaki OS-4000: The Cons

While the OS-4000 has all the bells and whistles you want in a massage chair, it also has its downsides:

  • Not fully transportable because of its heavy weight
  • Can be a strong massage for young users
  • Arrives in two pieces and can be difficult to put together
  • Not suitable for very tall or heavy users (view our article on the best massage chairs for taller people!)

After road-testing the Osaki OS-4000, it was hard to believe the range of features compared to its price.

At under $2000, this is one of the most affordable massage chairs on the market. And yet, it has most of the features that more expensive models have.

I think that the OS-4000 is the perfect option for those that want a good-quality massage chair without going overboard. A lot of the more expensive massage chairs are priced higher because they have a lot of unnecessary features, in addition to the features that make a good massage.

The Osaki OS-4000 is sophisticated enough to be able to provide a well-rounded, customizable massage, without the bells and whistles.

In addition, Osaki chairs are known for their durability and quality build. Most Osaki chairs last a decade or more, and the OS-4000 is no exception to this.

Finally, Osaki has excellent customer service, so in the unlikely case that you experience an issue with your chair, it will be easy to contact the company to have the issue resolved.

All in all, you can’t go wrong with the Osaki OS-4000. It’s a trusty, reliable, comfortable massage chair for a great price!



Osaki OS-4000 Massage Chair: Conclusion

We hope this article has been helpful to you in deciding if the Osaki OS-4000 is right for you.

This is an excellent chair for the price. If you suffer from aches and pains or have a physically demanding job, this chair might just be the relaxation experience you’ve been looking for – and it won’t break the bank in the process!

Still don’t think the OS-4000 is quite right? Here are some other articles we’ve written about Osaki chairs that you may also want to read:

Best Osaki Massage Chair
Osaki OS-Pro Maestro Review
Osaki TP 8500 Review
Osaki OS-4000XT Review

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