Experience Full-Body Mastery with the OP-4D Master Massage Chair

4D Massage Mechanism – Human-like roller movement that adjusts in real time for depth, speed, and rhythm
SL-Track Design – Laser-crafted steel rail follows the full curve of your spine from neck to hamstrings
AI Muscle Tension Detection – Health Pro program scans your torso and builds a custom massage program around your body's needs
Over-the-Shoulder Airbag Massage – First-of-its-kind 10-airbag system that rotates and compresses like real hands on your shoulders
46 Air Cell Compression – Full-body air massage coverage from shoulders to calves for complete circulatory relief
Zero Gravity Reclining – NASA-inspired positioning removes spinal pressure and deepens the effectiveness of every session

Lumbar & Foot Heat Therapy – Heating coils target the lower back and feet to ease soreness and improve circulation
16 Auto Programs & 6 Massage Styles – Versatile programming for relaxation, deep tissue, stretching, sleep, spine care, and more
Surround Sound Bluetooth Speakers – Built-in audio system lets you pair your device for music, meditation, or podcasts during your session
Voice Control & App Compatibility – Works with Alexa and the Osaki Premium 4D+ Master App on iOS and Android
Space-Saving Technology – Reclines to full zero gravity with just 3 inches of wall clearance
5-Year Warranty – Includes 3 years of full service coverage plus an additional 2 years of parts coverage for long-term peace of mind.

Revolutionary 4D Massage Technology with the Osaki OP

Take recovery into your own hands with the Osaki OP-4D Master — a premium massage chair engineered to melt away muscle tension, dissolve daily stress, and deliver deep, restorative relaxation on demand. Featuring intelligent muscle tension detection, an industry-first over-the-shoulder airbag massage, and zero gravity positioning, every session is tailored to your body. Control it all from the Osaki Premium Master app or simply say the word with Alexa voice command.

Front view OP-4D Master showing full body coverage

Osaki OP-4D: The First Massage Chair That Actually Gets Your Shoulders

The Osaki OP-4D Master redefines what a massage chair can do with a first-of-its-kind over-the-shoulder massage system. Ten precision airbags work in synchronized motion — rotating and compressing in patterns that closely mimic the feel of real hands — delivering a soothing, wrap-around shoulder experience unlike anything else on the market.

The intelligent body scan technology automatically maps your unique shoulder height and width, precisely positioning the massage rollers for a customized, full-contact massage tailored to your body.

Dual massage nodes on each shoulder pad mimic the feel of human hands, delivering a realistic, hands-on massage experience right where you need it most.

Smart Voice Control with the Osaki OP Master

Control your relaxation without lifting a finger. The Osaki OP-4D Master is fully compatible with Alexa voice commands, letting you start, stop, and adjust your massage session hands-free — through any Alexa-enabled device or the Alexa app on your smartphone.

OP-4D Master LCD remote control with massage settings

The Osaki OP-4D Master Muscle Tension Detection: The Chair That Reads Your Body So You Don't Have To

The Osaki OP-4D Master's built-in Health Pro program uses AI technology to scan your torso, identify areas of tension, and automatically build a massage program around your body's specific needs — because no two bodies are the same.

It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

OP-4D Master massage chair muscle tension detection device

Image of phone with massage chair app open and in use

Image of tablet remote with touchscreen controls

Massage chair 4D+ Massage Mechanism in detail

Massage chair image collage describing chair features

Image of massage chair in zero gravity recline and heated zones

Detailed image of massage chair foot rollers, side panel and phone charger

Detailed image of massage chair speakers, lighting and USB port

Osaki OP-4D Master Massage Chair Specifications

Product Name	Osaki OP-4D Master
Power Supply	110 - 120V
Rate Frequency	50 / 60Hz
Chair Dimensions (W x L x H)	Upright 31.5" x 68.0" x 50.5" Reclined 31.5" x 72.0" x 42.0"
Chair Weight	254.6 lb
Width	Shoulder 24.5" Seat 18.0"
Minimum Door Width	31.5"
Package Dimensions (W x L x H)	Box 1 55.3" x 33.9" x 50.0" Box 2 23.4" x 20.3" x 22.4"
Package Weight	Box 1 249.1 lb Box 2 49.6 lb

Osaki OP-4D Master Massage Chair Dimensions

Osaki OP-4D Master Massage Chair User Manuals

Osaki OP-4D Master Massage Chair Instruction Manual

Osaki Massage Chair

Osaki OP 4D Master Massage Chair