Browse all models →DOCUMENTATION-BASED PRODUCT REVIEW
Model: OS-4000XT
A full-size chair with a notably long 79-inch reclined footprint and 28.8-inch minimum doorway—measure the room and route before focusing on its feature list.
Research by the Recline Guide Editorial Team · Documentation last reviewed August 29, 2026 · Amazon availability can change
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QUICK SPECIFICATIONS
Source checked: Osaki USA product page. Specifications may change by revision or seller bundle; match the model name and product label before purchasing.
DETAILED OVERVIEW
The OS-4000XT is a conventional 2D L-track chair with six automatic programs, computer body scan, 24 airbags, lumbar heat, foot rollers, calf compression, Bluetooth audio, and two-stage zero gravity.
Its practical story is the footprint: the chair is only 28.8 inches wide, but it is 67.2 inches long upright and 79 inches when reclined. It suits a long, narrow placement zone better than a shallow room.
WHO IT SUITS
FEATURE ANALYSIS
The 2D mechanism travels vertically and horizontally along an L-shaped path that continues beneath the seat. Computer body scan is intended to locate the shoulders before a program begins.
Twenty-four airbags provide compression, while separate foot rollers and calf compression cover the lower legs. Heat is concentrated in the lumbar area.
FIT AND ROOM PLANNING
Osaki publishes 20.5 inches at the shoulders and a 19.5-inch seat width, but the current official page does not publish a user-height or maximum-weight limit. Those missing constraints make a sit test or seller confirmation especially important.
The exact rear gap is not published despite the space-saving description. The chair itself is 28.8 inches wide, and Osaki also lists 28.8 inches as the minimum doorway. Allow more room for trim, hinges, packaging, and turns.
Check the room-fit calculator →ADVANTAGES
LIMITATIONS
DELIVERY AND SETUP
217.1 lb gross; minimum doorway 28.8 in. The chair weight is 175.2 lb, and the setup guidance is: Verify listing and delivery service. Measure every doorway, turn, stair, and landing; confirm whether delivery is curbside, threshold, room-of-choice, or white glove.
WARRANTY AND SUPPORT
The current official product page does not provide a definitive warranty term in the extracted specification. Confirm the seller, warranty administrator, and coverage before checkout.
Use Osaki USA’s official support channel and the seller shown on the exact purchase listing. Do not assume Amazon is the warranty provider.
NOT RELIABLY VERIFIED
BEFORE YOU ORDER
Confirm the exact model name, selected color or configuration, seller, warranty administrator, delivery service and return-freight responsibility on the checkout page. Save a copy of the listing and warranty shown when you order.
For fit, compare every intended user with the published height and load limits above. For delivery, measure the packaged route—not only the assembled chair—and include door trim, turns, stairs, landings and elevators.
SIMILAR CHAIRS TO CONSIDER
PRODUCT-SPECIFIC FAQ
Not published on current product page
Not published on current product page
Space-saving recline; exact rear gap not published
Yes. Osaki documents two zero-gravity stages.
Foot rollers and calf compression
Lumbar heat
Verify listing and delivery service
L-track. Yes. Computer body scan is documented on the official product page.
LEARN BEFORE YOU BUY