Kanji Sonoma 4D Massage Chair

The Kanji Sonoma 4D is Kanji's mid-flagship — a true 4D chair with the brand's signature Japanese-influenced engineering at a $10,623.95 entry price into the Kanji lineup. Where the Shogun Duo (Kanji's top-of-line) runs twin tracks, the Sonoma 4D delivers a single-track 4D experience refined over multiple generations — quieter motor, smoother roller transitions, and a control menu that leans toward Shiatsu-style routines instead of the generic relaxation/deep-tissue split most chairs ship with.

Why You'll Love the Sonoma 4D

• Single-Track 4D Mechanism — Genuine 4D depth, speed, and width modulation — same axis set as Kanji's flagship Shogun Duo, packaged into a single-track chassis at a meaningfully lower price.
• Japanese Shiatsu Programs — Pre-programmed routines inspired by traditional Shiatsu — short bursts, varied pressure, no pre-warmup needed. Distinctly different feel from the standard Western relaxation programs you find on most American-market chairs.
• SL-Track Coverage — Roller path runs from neck through lower glutes — full spinal coverage, no lumbar dead zone that single-track S-Track chairs leave.
• Whisper-Quiet Motor — Acoustic-dampened motor casing — the Sonoma is one of the quietest 4D chairs at any price, which matters if you're using it during evening household hours.
• Auto Body Scan + Adjustable Roller Path — Body scan calibrates roller path to your spine; manual override lets you shift the path up or down if your tension zone sits outside the scanned range.
• Zero-Gravity + Full-Body Air — Multi-stage zero-gravity recline with comprehensive airbag coverage from shoulders through calves — full-body session, not just back-and-neck.

Key Specs at a Glance

• Massage Mechanism: 4D variable-depth/speed/width rollers
• Track Type: SL-Track (neck through lower glutes)
• Body Scan: Auto body scan with manual roller-path override
• Auto Programs: Multiple preset routines including Japanese Shiatsu sequences
• Recline: Multi-stage zero-gravity
• Air Compression: Full-body — shoulders, arms, hips, calves
• Heat: Lumbar zone heat therapy
• Acoustic: Acoustic-dampened motor casing
• Power: 110V standard household outlet
• Warranty: Kanji manufacturer limited warranty

Built for the Quality-First Buyer

The Sonoma 4D is the chair we recommend when the buyer cares more about HOW the massage feels than about how many gimmicks the chair lists on the spec sheet. Kanji's engineering DNA is closer to the Japanese-domestic-market chairs than to the typical American import — the Shiatsu programs are noticeably different from the standard Western auto routines, and the quieter motor matters in a way that doesn't show up on a comparison chart. At $10,623.95 it's the entry into Kanji's 4D lineup; if you want twin-track coverage you step up to the Shogun Duo, but for a single-user household where one person is the primary user, the Sonoma 4D is one of the best single-track 4D values in the catalog. Pair it against a similarly priced Osaki and test both — the Kanji will feel more deliberate, the Osaki will feel more feature-loaded. Different audiences buy each.

Why Buy from Peak Flow Fitness

• Authorized Kanji dealer — every chair ships factory-fresh with full manufacturer warranty intact.
• Free curbside shipping on every order — no hidden freight surcharge at checkout.
• White-glove delivery available — in-room placement, unboxing, and packaging removal as a paid upgrade.
• Financing through Shop Pay — split orders under $1,000 into 4 interest-free payments, or larger orders into 3, 6 or 12 monthly payments with rates disclosed at checkout.
• Price match guarantee — find the same chair cheaper at an authorized dealer and we'll match eligible offers (terms apply).
• US-based support — Mon–Fri 9 AM–9 PM EST at 646-921-5221 or support@peakflowfitness.com.

Shipping Information

Once you place an order with Peak Flow Fitness, you'll receive a confirmation email from our team. Have questions? Text or call us at 646-921-5221 or email support@peakflowfitness.com.

Processing time: Most orders are processed within 1–3 business days.

Shipping method: Smaller items ship via UPS, FedEx, or USPS. Large equipment — including saunas, cold plunges, massage chairs, and gym machines — ships via LTL freight with curbside delivery. Our freight carrier will contact you to schedule your delivery appointment.

Transit time: Standard shipping typically takes 5–15 business days after processing; freight shipments typically take 7–21 business days and are scheduled with you in advance.

Damage: Please inspect your delivery and report any shipping damage within 48 hours to support@peakflowfitness.com.

Where we ship: We currently ship within the continental United States. Only certain products can be shipped to Alaska and Hawaii. Customers in those states must email us at support@peakflowfitness.com for a shipping quote. Enjoy free shipping on orders over $999 (exclusions apply).

Full details: Shipping Policy.

If you buy from us and then find the same item for less at an authorized US online retailer, send us proof (a link, screenshot or quote) and we'll refund the difference on eligible offers.

Limitations:

• Items covered by a manufacturer's Minimum Advertised Price (MAP) policy are not eligible
• The item must be in stock at an authorized online retailer — no auction, discounter or marketplace sites, and no retail-only stores
• Rebates, bundle or buy-one-get-one offers and once-a-year promotions such as Black Friday/Cyber Monday are excluded
• The match covers item price and shipping and excludes sales tax

Full terms: Price Match Guarantee.

Return Policy

Items may be returned within 30 days of delivery if they are unused, in original condition and with all original packaging (including pallets). Please contact us before sending anything back.

Restocking fee: returns, cancellations and refused shipments that have already shipped are subject to a restocking fee of 15% minimum, depending on the product and brand. The fee is waived if the item arrived damaged or defective, the wrong item was shipped, or the error was ours. Return shipping is the customer's responsibility unless the error was ours.

Damaged or missing parts: report shipping damage within 48 hours of delivery, with photos, to support@peakflowfitness.com or 646-921-5221 and we'll make it right.

Cancellations: orders cancelled before they ship may have a 3% payment-processing fee deducted. Orders that have shipped are handled as returns.

Some brands have their own terms. See our full Return & Refund Policy before you buy.