Flagship 5D+4D Dual Chair
Osaki Ai Apex Duo 5D+4D Massage Chair
The Apex Duo is the top of the Osaki line. It runs a dual 5D+4D mechanism that works the upper and lower body together, with 5D rollers that map your back in real time and massage heads that adapt as you shift in the seat. For an athlete who wants the deepest, most adaptive massage available, this is where the lineup ends.
It also solves the parts other chairs ignore. A sliding-door system opens both sides at the press of a button for easy entry, an AI health system reads vitals like blood oxygen and heart rate, and a triple heating zone warms the lumbar, calves, and feet at the same time.
Roller System5D + 4DDual upper + lower mechAir Cells62Full-body compressionAuto Programs46Most in the lineupWall Clearance1″Micro space-savingAI health detectionSliding-door entryTriple heating zone8″ touchscreen
The Technology
The systems around the dual mechanism
A flexible track, live body mapping, and a near-zero wall gap let the Apex Duo deliver a full, adaptive massage in almost any room.
?️SL-Track TechnologyThe SL-track runs from the neck down to the glutes and hamstrings in one path, covering the full back and lower body with a smooth, consistent stroke instead of stopping at the lower back.Neck to hamstrings?Live Time Body ScanA real-time body scan keeps the massage accurate through the whole session. As you shift in the chair, the heads move with your body and stay on the key pressure points along your back.Adapts as you move?3-Stage Zero GravityThree NASA-inspired zero-gravity recline stages progressively shift weight off the spine, so the rollers and air cells work into an unloaded back at the angle you choose.Three recline stages?Micro-Space SavingThe chair slides forward as it reclines and needs just 1 inch of clearance from the wall for a full recline, so a full-size flagship fits against the wall of a normal room.1″ wall clearance
Why Athletes Choose This
Every recovery feature in one chair
?Dual 5D+4D, upper and lowerDual Mechanism❤️Reads blood oxygen and heart rateAI Health Detection?Sliding-door easy entryPress-Button Entry?️62-cell full-body air massageAir Massage♨️Triple heating zoneLumbar · Calf · Foot?Deep calf kneading and foot rollersLower-Leg Recovery?️46 auto programs, 5-level controlFully Adjustable?Aroma, chroma and ion therapySensory Features
Built For Recovery
A closer look at how it works
Dual 5D+4D Mechanism
Two systems, 5D depth, mapped to your back in real time
The Apex Duo runs a 5D+4D dual massage system that works the upper and lower body together. The 5D rollers perform a real-time body scan, map the pressure points along your back, and adapt to your movements as you settle in, so the stroke tracks you rather than a fixed pattern.
- Upper and lower mechanisms run together
- 5D rollers map your back in real time
- Heads adapt to your movements
Full-Body Sync5D DepthAI Health Detection
A chair that reads your vitals and shows them to you
An AI health system reads vitals while you sit and uses them to personalize the session. The 8-inch touchscreen tablet surfaces health insights like blood oxygen and heart rate, and updates your massage programs over Wi-Fi so the chair stays current.
- Reads blood oxygen and heart rate
- AI personalizes the massage to your readings
- 8″ touchscreen with Wi-Fi program updates
AI-TunedVitals Display62-Cell Air Compression
62 airbags, including a 3-segment armrest squeeze
Sixty-two airbags with multi-layered construction deliver progressive compression across the body. The arm and palm airbags are divided into three sections that fire in sequence, producing a wave-like kneading and pressing motion through the forearms and hands.
- 62 strategically placed airbags
- Multi-layered, progressive compression
- 3-segment armrest and palm airbags
Wave CompressionArm & PalmHeat & Lower-Leg Recovery
Triple-zone heat with deep calf and foot work
Heat reaches the lumbar, calves, and feet together, warming the areas that tighten most after training. Underneath, outer-rotation calf kneading uses 8 airbags and 2 rollers, while 4 foot rollers and 16 airbags work the sides, soles, backs of the feet, and the Achilles tendon.
- Heat across lumbar, calves and feet
- Calf kneading: 8 airbags + 2 rollers
- Foot massage: 4 rollers + 16 airbags, plus Achilles
Triple HeatCalf + Foot
Full Spec Sheet
Specifications
Massage System
Roller System5D + 4D dual mechanism (upper + lower)Track TypeErgonomic SL-track (neck to glutes/hamstrings)Air Cells62, with 3-segment armrest airbagsCalf MassageOuter-rotation kneading, 8 airbags + 2 rollersFoot Massage4 rollers + 16 airbags (soles, sides, Achilles)Auto Programs46Manual Modes5 (Kneading, Tapping, Knocking, Shiatsu, Kneading & Tapping)Adjustability5 levels each: intensity, speed, pressureHeatingTriple zone: lumbar, calves, feetFootrest ExtensionAutomatic, up to 7″ (fits up to 6’3″)
Smart & Comfort Features
Health DetectionAI; blood oxygen and heart rateBody ScanLive time, real-time adjustingPressure SensingSmart Pressure SensorsEntrySliding-door system, both sidesVoice ControlHands-free preset commandsController8″ touchscreen, Wi-Fi updatesSensoryAromatherapy, negative ionizer, chromotherapy LEDAudioBluetooth speakersChargingWireless charger + USB port
Dimensions
Upright (W × L × H)33.5″ × 65.7″ × 48.5″Reclined (W × L × H)33.5″ × 70.9″ × 34.6″Shoulder Width24.5″Seat Width21.0″Minimum Door Width33.5″ assembled / 30″ disassembledWall Clearance (reclined)1″
Capacity & Power
Maximum User Weight280 lbFits Heights To6’3″Chair Weight332.3 lbPower Supply110–120VRated Frequency50 / 60Hz
Packaging
Box 1 (W × L × H)33.5″ × 51.4″ × 50.2″ — 340.6 lbBox 2 (W × L × H)16.9″ × 41.8″ × 29.6″ — 56 lb
Trusted By Customers
What owners say after daily use
The massage patterns feel very natural and human-like. Especially the lower back and neck coverage is excellent. It helps me recover quickly after long work hours.
?RichardVerified store visitor
The AI Apex Duo adjusts perfectly to my body every time I use it. The massage feels deep but still very comfortable, especially on my back and shoulders. I can really feel the tension melting away after a long day.
?AlexanderVerified store visitor
I use this chair every evening after work and it makes a huge difference. The dual system really targets sore muscles effectively. Worth every penny for the comfort it provides.
?️LiamVerified store visitor
Questions
Frequently Asked Questions
It runs a dual 5D+4D mechanism that massages the upper and lower body at once, with 5D rollers that map your back in real time. It also adds features the other chairs don’t, including a sliding-door entry, AI health detection, a triple heating zone, and 46 auto programs.Both side panels glide open at the press of a button without needing extra space, so you can step in and out easily and still place the chair close to a wall. It’s helpful for anyone with limited mobility.The system reads vitals such as blood oxygen and heart rate and uses them to personalize the session. The 8″ touchscreen displays those health insights and updates programs over Wi-Fi.Calf kneading uses outer-rotation motion with 8 airbags and 2 rollers, and the foot massage uses 4 rollers and 16 airbags across the soles, sides, and backs of the feet, including the Achilles tendon.The chair supports a maximum user weight of 280 lb, and the legrest extends up to 7 inches to fit users up to 6’3″.The Apex Duo comes in Taupe, Brown, and Black.The Apex Duo includes a 5-year warranty: 3 years full service plus an additional 2 years parts.
