Osaki OS 4000T Review

by Mary Lou | Last Updated: January 25, 2019 When you buy something using the links on our posts, we may earn a small commission at no additional cost to you. Learn more.

Executive Summary

The Osaki OS-4000T is a solid and reliable massage chair that is a fraction of the cost of premium chairs. Equipped with highly desirable features like Zero Gravity and Air Massage technologies and available at such an affordable price, it’s no wonder that it made it to our top 10 picks for best massage chairs.

An upgrade of the Osaki OS-4000, the 4000T improves on the weaknesses we found in the 4000 model.

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Company Background

Titan World LLC is the maker of the Osaki series of massage chairs.

Titan World is among the leading suppliers of handheld massagers, electric massage chairs, fitness machines, back relief products, and foot massagers. The main priority of Titan is to provide relaxation to the body in order to achieve an active lifestyle.

Osaki OS-4000T Specifications

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The main body dimensions of the Osaki OS-400T are 52 L x 31 W x 34 H (Inches), and the vertical side is 38 L x 25 W x 15 H (Inches).

User Height Range: up to 6’2″


The Osaki OS-4000T has a 3-year warranty.

Main Features

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Other Cool Features:

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High Customer Satisfaction

The adage the proof of the pudding is in the eating can’t be much truer than for the 4000T. This particular Osaki model is truly comfortable and gives an excellent massage. All features deliver.

Just by looking at the construction and design of this electric massage chair, it gives you the feeling that it can last you years and years. And this feeling is proven by reviews shared by satisfied buyers and users who have had their chairs for quite some time. It’s telling that it’s so hard to find negative feedback about this chair.

Solid Features

We’ve said this of the earlier model and we’re saying it again, these models have very solid features. First off, a lot of these features were only previously available in high-end premium massage chairs. Secondly, they are assembled so well so that they always perform reliably. This makes them the perfect investment for your health and wellbeing.

We’ve already mentioned some of the features but there’s also:

Great for Back Pain And Other Aches

If you suffer from back pain, lower back aches, or any sort of muscle pain in your body, then you should definitely consider this massage chair as it has a proven track record for pain management.


We definitely like the upgrades on the Osaki OS-4000T. 

Excellent Customer Support

We didn’t give the Osaki 4000 a glowing review in the customer support department before. We’re happy to report though that recent interactions with the Osaki team have been highly satisfactory with individual customer agents going the extra mile to help out their customers.


One Size Doesn’t Fit All

The body of the 4000T remains the same, hence, our initial review that these models don’t fit bigger frames well still holds. If you are over 6 feet and have broad shoulders, you may experience the following:

If you’re handy with a screwdriver though, the first problem appears to be easily fixed by moving the 3 mounting bolts on the shoulder panel area from the inner holes to the outer holes to create a bigger space.


If you’re considering the Osaki OS-4000, then we’d highly recommend you fork out the extra cash and go for the 4000T instead. You’ll be thanking us in the years to come as you enjoy your upgraded hardware.

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Author: Mary Lou
In the Before Times, Maru spent vacations traveling and making stops at showrooms to test the latest massage chair models. Nowadays, she’s hunkered down in her small sunlit home dotted with her ever-growing collection of fiddle fig trees, indoor plants, and Himalayan salt lamps. Find her at LinkedIn.