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Osaki Somnus 4D Duoflex Ai

Ranked #2 of 35 in Best Full-Body Massage Chairs: Osaki, Real Relax, Human Touch, Bodyfriend & Kahuna (2026). Here is every spec we scored, where it came from, and how it compares.

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O

#2

Osaki Somnus 4D Duoflex Ai

Best for: 48 air cells with heated back rollers

8.3/10

What we like

Watch out for

Track length not published by Osaki

Score breakdown

Massage mechanism (2D–5D) 20%

SL-track 15%

Track length * 10%

Air cells / airbags 15%

Zero gravity 10%

Heat 10%

Foot rollers 10%

Max user weight 10%

* Not published by the manufacturer; scored at the lowest published value in this category, so an unpublished figure never outranks a published one.

Massage mechanism (2D–5D)	4 D
SL-track	Yes
Track length	Not listed
Air cells / airbags	48
Zero gravity	Yes
Heat	Yes
Foot rollers	Yes
Max user weight	280 lb
Track type	SL-track
Massage mechanism	4D
Zero gravity	Yes
Heat	Lumbar and calf heat; heated back rollers
Chair weight	269.1 lb
User height range	Not published by the maker
Price	Check price

Check price at Amazon

Specs sources:

Osaki Somnus 4D Duoflex Ai head-to-head

Head-to-headOsaki 5D+4D Kairos Duo vs Osaki Somnus 4D Duoflex Ai Head-to-headOsaki Somnus 4D Duoflex Ai vs Osaki Aeris 4D Duo

How it compares

Open the full comparison table

Osaki 5D+4D Kairos Duo

#1 · Most air cells here (56) and a 5D upper mechanism

Osaki Aeris 4D Duo

#3 · 44 air cells, 206.6 lb

Osaki Vista 4D

#4 · 53.1 in SL-track with 38 air cells

Osaki 4D Optim

#5 · 53 in SL-track, voice control

Osaki One 4D

#6 · 53 in SL-track with lumbar and foot heat

Real Relax PS6500

#7 · 4D with long SL-track and 300 lb limit

Osaki Ai 4D Yoga Flex

#8 · 4D with lumbar and calf heat, 280 lb limit

Real Relax PS5100

#9 · 4D SL-track with 30 air cells at 158.7 lb

Real Relax PS5200

#10 · 4D SL-track with 30 air cells

Osaki 4D+3D Bravo Duo Flex

#11 · Flexible SL-track, 4D+3D

Kahuna Dios Flexa

#12 · Longest track here: 56 in SL-track, 4D

Kahuna Dios 7300

#13 · Dual-core 4D+3D with zero gravity

Real Relax PS3300

#14 · 3D SL-track with 28 air cells, 300 lb limit

Osaki OS-3D Champ II

#15 · 3D SL-track with 32 air cells at 187 lb

Real Relax Favor-09

#16 · 3D SL-track with 28 air cells

Real Relax Favor-06

#17 · 3D SL-track with heart rate sensing, 300 lb limit

Real Relax Favor-27

#18 · 3D SL-track with 26 air cells

Real Relax Favor-22

#19 · 3D SL-track with 24 air cells

Real Relax Favor-24

#20 · 3D SL-track with back and calf heat

Human Touch Novo Flex

#21 · S- and L-track with heated foot and calf massager

Human Touch Super Novo 2.0

#22 · S- and L-track, 3D Intellitrack

Human Touch Super Novo 3.0

#23 · S- and L-track with heated foot and calf massager

Human Touch Super Novo X

#24 · Zero gravity with side-entry doors

Real Relax Favor-11

#25 · 3D SL-track at 125.7 lb

Bodyfriend Pharaoh Q

#26 · Highest user weight here: 367 lb

Bodyfriend Falcon SV

#27 · Robo-Walking legs with 36 airbags and zero gravity

Bodyfriend Pharaoh NEO

#28 · Full-body heating and a 300 lb limit

Human Touch WholeBody ROVE

#29 · S- and L-track at 180 lb

Real Relax Favor-03 3D Lite

#30 · SL-track with foot rollers

Kahuna Compact Dios Hani

#31 · Compact 52 in SL-track with heat

Human Touch WholeBody 7.1

#32 · Swivel recliner with BodyMap PRO

Human Touch WholeBody 8.0

#33 · Swivel recliner with warm-air technology

Real Relax FS-01

#34 · 2D ADV with rocking and calf heat

Real Relax BS-07

#35 · 20 air cells with back and calf heat