Osaki Massage Chair AI Apex Duo 5D+4D
HSA/FSA eligible — pay with pre-tax dollars.
6-Month Price Protection: if our price drops within 6 months, Black Friday included, we'll refund the difference. Details
Every chair we sell is on the floor in both showrooms (3,500–4,000 sq ft each), so you can try them all in one visit. Walk-ins welcome · Hours
Key specs
- Size upright
- 65.7″ L · 48.5″ H
- Size reclined
- 70.9″ L · 34.6″ H
- Power
- 120V · 60Hz · 300W
- Warranty
- Manufacturer warranty — see warranty details
- Delivery
- White-glove delivery and setup included
House of Massage Chairs · Model Guide
The Osaki AI Apex Duo massage chair brings two massage mechanisms, Live Time Body Scan, smart pressure sensing, and a lower-body system built to do real work — for buyers who want layered coverage and are willing to use the extra control it provides.
01 · Decision Summary
A dual-mechanism chair should earn the extra complexity.
In brief
The Osaki AI Series Apex Duo 5D+4D Massage Chair pairs two massage mechanisms with an SL-Track, Live Time Body Scan, and Smart Pressure Sensors. The Osaki AI Apex Duo massage chair needs 1″ of wall clearance and 70.9″ of length when reclined. Key differentiators include 62-cell full-body air compression, triple-zone heat, deep calf kneading, foot rollers, 46 auto programs, an 8″ touchscreen, and voice control. It is feature-dense, so buyers who prefer simpler controls or have uncertain fit limits should compare before committing.
Dual mechanism
The defining hardware is a Dual 5D+4D Massage Mechanism rather than one roller mechanism carrying the whole session.
Fit logic
Live Time Body Scan and Smart Pressure Sensors give the chair more information about the person seated before and during use.
Compression
A 62-cell full-body air system adds wraparound pressure beyond the roller path.
Lower body
Deep calf kneading, foot rollers, and automatic foot extension make the footwell a working system rather than a passive rest.
Heat and recline
Triple heating zones and three-stage zero gravity shape the comfort character of longer sessions.
Control
An 8″ touchscreen and intelligent voice control reduce the friction of navigating 46 automatic programs.
02 · The Working Systems
Five systems. One chair.
See what changes the session.
- 01
- 02
- 03
- 04
- 05
Fig. 01 — Dual 5D+4D Mechanism
The Mechanism
Two mechanisms. Different jobs.
The Apex Duo is built around a Dual 5D+4D Massage Mechanism on an SL-Track. The decision is whether two mechanisms create the layered coverage you prefer across a full session, rather than whether the dimensional label sounds more advanced.
- MechanismDual 5D+4D
- TrackSL-Track
Why it mattersThe value is the resulting coverage character, not the feature count.
The Personalization
Scan first. Then refine pressure.
Live Time Body Scan establishes a body-aware starting point, while Smart Pressure Sensors support pressure response. This is especially relevant when household users differ in shoulder position, torso length, or pressure preference.
- Body scanLive Time Body Scan
- Pressure systemSmart Pressure Sensors
Why it mattersScan and pressure response are fit tools, not medical diagnostics.
The Warmth
Heat in three documented zones.
The triple heating system covers the lumbar area, calves, and feet. It changes the comfort feel of a session without implying a medical outcome.
- LumbarHeated comfort zone
- CalvesHeated comfort zone
- FeetHeated comfort zone
Why it mattersJudge heat by placement and preference, especially at the calves and feet.
The Lower Body
The footwell has its own workload.
Deep calf kneading, foot rollers, automatic foot extension, and 62 air cells make the lower body active rather than passive. Air adds wraparound pressure while the foot and calf hardware adds mechanical sensation.
- Air system62 cells
- CalvesDeep calf kneading
- FeetFoot rollers
- LengthAutomatic foot extension
Why it mattersConfirm calf squeeze, foot roller feel, and leg length with the primary user seated normally.
The Command Layer
Forty-six programs need a clear front door.
The chair pairs 46 automatic programs with an 8″ touchscreen and intelligent voice control. A sliding side-panel design changes the entry sequence and should be tested for everyday ease.
- Programs46 automatic
- Controller8″ touchscreen
- Hands-freeIntelligent voice control
- EntrySliding side-panel system
Why it mattersTry the screen, voice commands, and entry sequence before judging the chair by its feature list.
03 · The Daily-Use Test
The extra mechanism has to earn its place.
Apex Duo makes the strongest case when its dual mechanism, scan logic, air system, and lower-body hardware work together. The goal is layered use, not technology for its own sake.
The tradeoff is more systems to learn, fit points to verify, and pressure zones to tune. Compare control complexity as carefully as massage feel.
- i.Dual 5D+4D mechanismLayered roller architecture
- ii.46 auto programsFast repeatable starting points
- iii.Bluetooth speakersAudio during a session
- iv.Aroma + color lighting LEDOptional atmosphere features
- v.Wireless charging + USBDevice convenience
The Apex Duo is a home relaxation and wellness product. Body scanning, heat, air compression, and massage features should not be interpreted as diagnosis, treatment, or a substitute for professional medical care.
04 · Body Fit
Fit is where the specification becomes personal.
House of Massage Chairs documents a 21″ seat width and 24.5″ shoulder width, but Osaki does not publish a user-height range or maximum user weight for the AI Apex Duo. Confirm both with us before purchase, or sit in it at either showroom.
Plan a fit-first comparison →Let the chair establish the starting point.
Live Time Body Scan helps place the roller session around the person seated. Check shoulder contact after the scan rather than assuming the first position is automatically ideal.
Use the published widths as a planning check.
The 21″ seat and 24.5″ shoulder dimensions frame fit, but body shape, arm position, and side-panel comfort still matter.
Automatic extension is useful only if it lands correctly.
Confirm calf placement, foot roller contact, and leg length with the automatic foot extension engaged. Lower-body pressure should feel deliberate, not cramped.
Test rollers and air separately, then together.
If you prefer gentler sessions, test the combined roller and 62-cell air pressure through a full program.
Verify every primary user.
For shared use, repeat the scan, calf fit, foot extension, shoulder contact, and controls for each person, then confirm height and weight with us.
05 · Feature Index
Feature first. Then what it changes.
Creates the model's defining layered roller architecture; compare it by coverage and feel, not by the dimensional label alone.
Provides the documented roller path for the chair's coverage.
Establishes a body-aware starting position before the program settles in.
Adds pressure-response information to the personalization system.
Adds wraparound pressure beyond roller movement alone.
Adds documented warmth at the lumbar area, calves, and feet for comfort-focused sessions.
Makes calf and underfoot sensation a primary decision point.
Adjusts the lower-body section for leg length; verify where calf and foot components land.
Provides three documented recline stages for different session preferences.
Reduces rear placement demand to a documented 1″ wall clearance, while the full reclined length still needs room.
Gives repeat users a broad library of guided starting points.
Makes the program library accessible while seated or reclined.
Changes the entry sequence, which is worth testing for mobility and room placement.
Adds audio plus wireless and USB charging convenience.
Aroma, negative ions, and LED lighting are optional atmosphere features; keep them secondary to fit, pressure, controls, and room requirements.
06 · In Your Home
One inch behind it. More room in front of it.
documented wall clearance. The micro-space-saving design reduces the rear gap, but room planning still needs the chair's full 70.9″ reclined length and 33.5″ width.
Finishes
- Black
- Taupe
- Brown
The live House of Massage Chairs variant list currently offers all three finishes.
Footprint
Current published dimensions are 33.5″ wide, 65.7″ long and 48.5″ high upright; reclined length is 70.9″ and reclined height is 34.6″.
Delivery path
Measure doors, turns, hallways, stairs, elevators, and the final placement path before delivery. Do not assume the 1″ rear clearance makes the chair small to move.
Power
The manufacturer manual lists 120V, 60Hz input and 300W rated power. Plan the placement around a compatible household outlet and follow the manual's electrical instructions.
07 · Ownership
The purchase is only the beginning.
Delivery
Free US shipping, with the estimated delivery shown above.
Warranty
5-year Osaki warranty — see warranty details.
Osaki lists 3 years of full service plus 2 additional years of parts for the AI Apex Duo, so ask us for the written coverage before you order. Your purchase is also covered by our 6-Month Price Protection, and you can pay with Affirm, as low as 0% APR, subject to eligibility.
White Glove
Included, with access still on you to verify.
Free US shipping with white-glove delivery and setup. Osaki lists a 5-year warranty — see warranty details. Use the live checkout and House of Massage Chairs policy page as the final commerce source before purchase.
08 · Buyer Fit
A strong fit for some buyers. Too much chair for others.
A strong fit if you…
- Want the Osaki Apex Duo specifically for its Dual 5D+4D mechanism and layered roller architecture.
- Value Live Time Body Scan and Smart Pressure Sensors as part of a more personalized starting point.
- Care about active lower-body hardware, including deep calf kneading and foot rollers.
- Expect to use a broad auto-program library rather than repeating one default routine.
- Have room for a 70.9″ reclined length even though rear wall clearance is only 1″.
Consider another model if you…
- Prefer a simpler single-mechanism experience and do not expect to use the added control depth.
- Are highly sensitive to calf squeeze, foot roller pressure, or broad air compression and cannot test first.
- Need to move the chair frequently or have a difficult delivery path that has not been measured.
- Want to compare a different dual-mechanism approach before committing at this tier.
The Closest Alternative
Compare the architecture, not the badge.
The closest alternative is the OS-Pro 4D DuoMax. Both use dual-mechanism architectures, but their documented hardware and program packages differ. Use those differences to choose the in-person comparison.
| Decision point | AI Apex Duo 5D+4D | OS-Pro 4D DuoMax |
|---|---|---|
| Massage mechanism | Dual 5D+4D Massage Mechanism | Duo 4D+3D mechanism |
| Track | SL-Track | SL Flex Track |
| Air compression | 62-cell full-body air massage | 36 air cells |
| Automatic programs | 46 auto programs | 20 auto programs |
| Personalization | Live Time Body Scan + Smart Pressure Sensors | Different documented feature package; verify scan and pressure behavior on the exact unit |
| Control emphasis | 8″ touchscreen + intelligent voice control | Smart voice control is documented; compare the exact controller workflow in person |
AI Apex Duo vs Grand Duo 4D+4D: the Grand Duo 4D+4D uses two 4D mechanisms on an SL-Track, with Smart Body Scan, 41 automatic programs, and 5 manual programs; the AI Apex Duo moves to a 5D+4D pair, 46 automatic programs, and Smart Pressure Sensors. Both list 62 air cells, a sliding side panel, and the same 33.5″ W × 70.9″ L reclined footprint.
Osaki AI Apex Duo massage chair specifications.
Commerce & identity
Massage system
Programs & controls
Dimensions & installation
Fit verification
Dimension reference
Delivery & coverage
Free US shipping with white-glove delivery and setup. Osaki lists a 5-year warranty: 3 years of full service plus 2 additional years of parts — see warranty details.
Exact-Model Questions
Osaki AI Apex Duo 5D+4D FAQ.
Where can I buy the Osaki AI Apex Duo massage chair?+
At House of Massage Chairs, an authorized Osaki dealer. You can order the Osaki AI Apex Duo online with free US shipping and white-glove delivery and setup, or buy it at our showrooms at Westfield Oakridge in San Jose and Stoneridge in Pleasanton, where walk-ins are welcome. Call or text (669) 214-8889 with questions before you order.
Can I try the Osaki AI Apex Duo before I buy it?+
Yes. The Osaki AI Apex Duo is on the floor at both of our showrooms, San Jose (Westfield Oakridge) and Pleasanton (Stoneridge), and walk-ins are welcome with no appointment needed. Each showroom is 3,500–4,000 sq ft and carries 70+ chairs, so you can compare the AI Apex Duo with the Grand Duo, the OS-Pro 4D DuoMax, and every other Duo model in one visit.
How much space does the Osaki AI Apex Duo need?+
1 inch behind it and 70.9 inches of length when reclined. The Osaki AI Apex Duo measures 33.5″ wide, 65.7″ long, and 48.5″ high upright, and 70.9″ long and 34.6″ high reclined. Micro-Space Saving Technology keeps the rear gap small, but measure doors, turns, hallways, and stairs too; the chair still has to reach the room.
What height and weight does the Osaki AI Apex Duo fit?+
No user-height range or maximum user weight is published for the Osaki AI Apex Duo. We list a 21″ seat width and a 24.5″ shoulder width, and automatic foot extension adjusts the leg section. Call or text (669) 214-8889 with each user's height and weight before ordering, or sit in the AI Apex Duo at either showroom to check shoulder, calf, and foot contact.
What is the difference between the Osaki AI Apex Duo and the Grand Duo 4D+4D?+
The mechanism and the program library. The Osaki AI Apex Duo pairs a 5D mechanism with a 4D one and lists 46 automatic programs, Live Time Body Scan, and Smart Pressure Sensors. The Grand Duo 4D+4D uses two 4D mechanisms with Smart Body Scan, 41 automatic programs, and 5 manual programs. Both list 62 air cells, an SL-Track, a sliding side panel, and a 70.9″ reclined length.
Should I buy the Osaki AI Apex Duo or the OS-Pro 4D DuoMax?+
Choose the Osaki AI Apex Duo if you want the 5D+4D mechanism, 62 air cells, 46 automatic programs, Live Time Body Scan, and Smart Pressure Sensors. Choose the OS-Pro 4D DuoMax if its 4D+3D mechanism on an SL Flex Track, 36 air cells, and 20 automatic programs cover the way you use a chair. Both have two mechanisms, so sit in them back to back.
Is the Osaki AI Apex Duo worth it?+
Yes, if you will use what sets it apart: the dual 5D+4D mechanism, Live Time Body Scan, Smart Pressure Sensors, 62-cell air compression, deep calf kneading, foot rollers, and 46 automatic programs. If you prefer one simple routine, the Osaki AI Apex Duo gives you more systems than you need, and a simpler single-mechanism chair may suit you better.
What does 5D+4D mean on the Osaki AI Apex Duo?+
Two massage mechanisms in one chair: one 5D and one 4D. The Osaki AI Apex Duo runs them on an SL-Track, so one roller mechanism does not have to carry the whole session. Live Time Body Scan sets the starting position and Smart Pressure Sensors support pressure response; judge the AI Apex Duo by coverage and feel, not by the dimensional label.
What warranty comes with the Osaki AI Apex Duo?+
5 years, as Osaki lists it: 3 years of full service plus 2 additional years of parts. House of Massage Chairs is an authorized Osaki dealer, so ask us for the written coverage on your Osaki AI Apex Duo before you order. Your purchase is also covered by our 6-Month Price Protection, and you can pay with Affirm, as low as 0% APR, subject to eligibility.
Is the Osaki AI Apex Duo HSA/FSA eligible?+
Yes. The Osaki AI Apex Duo is HSA/FSA eligible with a Letter of Medical Necessity (LMN). Our HSA/FSA massage chair guide explains how buying with HSA or FSA funds works, and you can call or text (669) 214-8889 with questions before you order the AI Apex Duo.
Before You Decide
Compare pressure, fit, and controls.Not just the feature count.
On an Apex Duo test, check shoulder placement, calf squeeze, foot roller contact, air intensity, touchscreen reach, voice control, sliding-panel entry, and your preferred recline.
The AI Apex Duo is on the floor at both showrooms, San Jose (Westfield Oakridge) and Pleasanton (Stoneridge). Walk-ins are welcome, no appointment needed; call or text (669) 214-8889 with questions.
The Decision
Osaki AI Apex Duo
5D+4D.
Choose the Apex Duo when its dual mechanism, scan-and-pressure system, 62-cell air package, active lower body, and rich controls are features you will genuinely use. Otherwise, compare before paying for complexity.
Osaki AI Series Apex Duo 5D+4D Massage Chair · Sold by House of Massage Chairs. The chair is a relaxation and wellness product, not a medical device. Free US shipping with white-glove delivery and setup. Osaki lists a 5-year warranty — see warranty details.
Compare similar chairs
Same brand or a similar price. Crossed-out prices are the brand’s MSRP.
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Osaki
Osaki Massage Chair Grand Duo 4D+4D
MSRP$14,999$11,999 -
Osaki
Osaki OS-Pro 4D DuoMax Massage Chair
MSRP$14,999$12,999 -
Osaki
Osaki Zion 4D Massage Chair
MSRP$12,999$10,499
Try it before you buy. Every chair we sell is on the floor in both showrooms — San Jose (Westfield Oakridge) and Pleasanton (Stoneridge Mall). Walk-ins welcome, no appointment needed · Questions? Call or text (669) 214-8889.
Still deciding? How to choose a massage chair by budget · Massage chairs compared for comfort and fit
What showroom visitors say on Google
Google reviews of our San Jose and Pleasanton showrooms (store reviews, not reviews of this product), quoted as written.
Great experience. I have been to this store twice and tried many of the chairs before choosing the Osaki Trion. The sales consultants are patient, competent and thorough. I never felt pressured to make a decision until I was ready.
J. M. · Pleasanton showroom · Google review
Amazing service from Gio! Totally no rush, no pressure to make a purchase! Gio was open, and took the time and initiative to make sure we were getting the chair that best fits our needs and pricing. We glad we made this purchase!
Y. G. · Pleasanton showroom · Google review
Henry and Shawn were absolutely amazing in helping us select the chair of my dreams. They went over and above in not only helping me compare the models and benefits but to also explain the technology behind the various ones I tried. Go here and be happy with the chair you pick!
M. R. · San Jose showroom · Google review
Just had an amazing experience buying my first massage chair. Gabe was very patient and explained in detail all the different chairs available in their showroom. They have a lot of different chairs in their showroom. I highly recommend coming here if you need to buy a massage chair!
S. L. · Pleasanton showroom · Google review
My husband and I stopped in on the fly to look at a foot massager. We got the best help from Shawn. He was so patient with us in our indecisiveness. Shawn is very knowledgeable in the inventory and we willingly tried a massage chair to check the new tech of the chairs. We tried several different chairs and ended up purchasing the 'Ferrari' chair. We are so grateful for his patience, his knowledge, and his continually helping us and with all the settings. We are excited about our new purchase and we are looking forward to the benefits and relaxing moments that await. Thank you Shawn for your help and good luck to you!
S. C. · San Jose showroom · Google review
Great experience shopping for a massage chair here! The store has a wide selection of massage chairs that you can actually try, which really helped us compare the different options.
My husband and I spent about two hours trying different chairs, and Shawun was very patient and helpful throughout the entire process. He let us try all the chairs we were interested in and clearly explained the features and differences between each one. We finally found a chair that we both really liked.
We really appreciate Shawun help, as well as Michael’s assistance. Great selection and very helpful service. Highly recommended!
N. M. · Pleasanton showroom · Google review
My wife and I have been looking at Massage Chairs on line for quite some time. Everything I've read, said to go out and try several to see what is the best fit, comfort and price.
Today, we went to House of Massage Chairs and met with Henry Ipek. He showed us numerous massage chairs to find out what was the best fit for us. I think we probably tried 10 different chairs while we were in the store.
Finally, my wife and I finally agreed on one chair that we both loved. It wasn't the chair I came in for or saw on line, but it was 10X better. We spent a little more than we initially wanted to, but when you figure this is going to last us a long time, we went ahead and pulled the trigger.
Henry was wonderful dealing with and gave us a good and fair price on the massage chair.
We couldn't be more happy with our purchase and the service we got from Henry.
T. S. · San Jose showroom · Google review
We were very impressed with the selection of massage chairs and the service we received. We were able to take our time trying many different models. Shawun was knowledgeable and patient, explaining the features of each chair and helping us find one that both my wife and I liked. Michael was also very helpful. We really appreciated their friendly service and would definitely recommend this store.
S. C. · Pleasanton showroom · Google review
Henry at House of Massage Chairs provided truly exceptional service from start to finish. He spent a generous amount of time with my wife and me, helping us find the right massage chair for both of our needs. He patiently walked us through the different brands, features, and technologies, explaining each brand’s approach and how those differences translate into the actual massage experience. His knowledge and attention to detail helped us feel informed and confident in our decision.
What really set Henry apart was how far he went to help us beyond the store visit. He assisted with delivery and even helped us navigate the return of a massage chair we had recently purchased. That level of care and follow-through made a big difference to us.
Throughout the entire process, we felt that Henry genuinely cared about finding the best fit for us. If you’re considering a massage chair, I highly recommend visiting House of Massage Chairs and asking for Henry. Thank you, Henry, for your patience, expertise, and outstanding service!
B. C. · San Jose showroom · Google review
Salesman Gabe spent time with us explaining the features of each chair and the differences between chairs. No pressure sales.
D. H. · Pleasanton showroom · Google review
We had a wonderful experience here! Henry was incredibly welcoming, knowledgeable, and professional. He took the time to understand what we were looking for and quickly helped us narrow down the options based on our preferences.
The store carries a great selection of different brands and models, probably one of the most comprehensive selections we’ve seen in the Bay Area. It was really convenient to be able to try so many different chairs in one place, and we found one we loved pretty quickly.
Henry also did a great job explaining the differences between the chairs, as well as the warranty and after-sales service for each option. We really appreciated how transparent and thorough he was—it made us feel very comfortable and confident about our purchase.
Overall, it was such a pleasant and stress-free shopping experience. Great selection, great service, and very knowledgeable staff. Highly recommend Henry and this store if you’re looking for a massage chair!
C. C. · San Jose showroom · Google review
We visited the store intending to buy a chair on father's day. Gabe's exceptional patience, comprehensive knowledge of all available chairs, and friendly, non-pressuring demeanor made the experience truly enjoyable. We spent over 3 hrs trying almost every chair, so much so that we didn't realize the mall had already closed. Despite this, Gabe graciously encouraged us to take our time and not rush our decision. Ultimately, we purchased a chair that exceeded our initial budget, but its quality has proven invaluable as we use it daily. Thank you Gabe again!
C. B. · Pleasanton showroom · Google review
Read all reviews on Google: San JoseRead all reviews on Google: Pleasanton
Quoted as written on Google, reviewer initials only. Ratings and review counts as of Oct 2026.