Kanji Sonoma 4D Massage Chair – 4D Massage Mechanism & SL-Track Roller System

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 into 4 interest-free payments, or 6–12 monthly with rates disclosed at checkout.
• Price match guarantee — find the same chair cheaper at an authorized dealer and we'll match it.
• 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: Most orders arrive within 5–10 business days after processing, depending on item size and your location. Freight shipments may take longer and are scheduled with you in advance.

Where we ship: We currently ship within the continental United States. Enjoy free shipping on orders over $999 (exclusions apply).

Peak Flow Fitness guarantees the lowest eligible online price on it's products.

If you find a lower price for any products on our store, we pice match it. In order to be eligible, you must provide proof - whether a screenshot, invoice, email, etc. of the lower offer.

Policy

We work very hard to ensure that we offer the absolute best prices online. If you find another online store that offers a lower price than us, please let us know and we will refund your original payment for the difference. We want you to feel confident that you are getting the absolute best price for the product you are ordering.

Our 100% Price Match Guarantee has some limitations:• You must purchase the item from our website before requesting your Price Match Guarantee
• Promotions such as rebates and buy one, get one free offers are not eligible
• The item must be in stock on the competitors website
• The competitor must be an online store, they may not have a retail location
• The website can not be a discounter or auction website (ie; eBay, overstock, etc.)
• Refund requests EXCLUDE special once-a-year promotions such as Black Friday/Cyber Monday.
• The competitor must be an Authorized Retailer of the product in question
• The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax.

*Certain exceptions may apply.Peak Flow Fitness strives to give its customers the lowest price allowed by its manufacturers. We want you to have the best value and the best deal which is why we always offer the best sales and discounts. Keep checking our website for new deals and subscribe to our social media accounts to get the latest that we are offering.

Return Policy

Returns

Your online shopping experience should be fun and easy, so don't be afraid to try some new things! If an item arrives broken or damaged, return it for a full refund within 30 days of your delivery date in its original condition and packaging. For an item to be eligible for a return, it must be unused and in the condition you received it in. 

*PLEASE BE AWARE THAT SOME ITEMS ARE SUBJECT TO A 15% MINIMUM RESTOCKING FEE UPON RETURN* (Click on the "Free Return '' option box at shipping checkout to avoid a restocking fee. Please note that the restocking fee does not include the return shipping costs associated with the product)

Packages that arrive with the incorrect product or are damaged are not subject to a 15% restocking fee. If there was any error on our end we will take care of it. Contact us with any additional questions or inquiries at 646-921-5221.

Missing Parts?

If for some reason your order arrives and is missing parts, please contact us immediately at 646-921-5221 and we will send out a replacement order for your missing part(s) immediately. 

Shipping

PeakFlowFitness will not cover the cost of return shipping. Shipping costs are non-refundable and are the responsibility of the customer, unless there was an error on our part. You will always have the option to request a return label and one will be provided for all your orders, but please note the cost of the return label can be deducted from your refund. 

Please reach out to 646-921-5221 to start your return!

To begin a return, please include a receipt or any other proof of purchase in your email. In addition, label the subject line of your message  "RETURN - ORDER #" so we can work on your return right away. 

It is also very important you state the reason for your return as well as any evidence of the product that may be needed in the return process, such as pictures or videos.

We asked that you contact us first and file a return so we can properly track the items before you return items to the manufacturer.

We use a warehouse to handle our returns. If a product was returned and we were not contacted about the return, it cannot be verified, therefore, there will be no refund. NO EXCEPTIONS! We ask that you please reach out to us and submit a return claim. 

There are situations where only partial refunds are granted (if applicable)

Books with obvious signs of use or wear and tear.

CD, DVD, VHS tape, software, video game, cassette tape, or vinyl record that have been opened or used. 

Any item that is not in its original condition, is damaged or missing pieces for reasons not due to our error. 

I PROVIDED THE WRONG ADDRESS

If you provided us with an incorrect address, or have misspelled information please do not worry. Simply reply to the order confirmation email you received and send us the correct information. We do ask that you notify us immediately via 646-921-5221. It is important that any mistakes made are corrected within 24 hours, before the item is shipped out. 

ITEM IS DAMAGED UPON ARRIVAL

We pride ourselves on taking care of each order that is sent out to our customers. However, accidents still do occur due to postal service mistreatment. Please follow these instructions if your item arrived damaged:

Please contact us with:

    - Your order number.

    - A picture or video of the damaged product.

Once your item is reviewed and processed, we will issue you a replacement item sent to you free-of-charge. In some cases we may also provide a shipping label to return the damaged item. If no label is provided, feel free to keep the item.

PLEASE NOTE: IF A PACKAGE ARRIVES DAMAGED. WE CAN REPLACE THE ORDER WITH NO ADDITIONAL COST, BUT IF YOU CHOOSE TO NOT GO AHEAD WITH A REPLACEMENT THE TRANSACTION WILL BE TREATED AS A RETURN AND ADDITIONAL FEES MAY INCUR. 

WHAT ARE MY PAYMENT OPTIONS?

We currently accept Stripe, Paypal, AMEX, Discovery, Mastercard, Visa or Paypal. Please contact us with any questions regarding payment options. 

I WANT TO EXCHANGE MY ORDER

If for some reason you are unsatisfied with your order and want to exchange it for a different make or model, please email us at support@peakflowfitness.com and we will issue a return label. The new product will then be shipped out in 1-2 business days. 

CAN I CANCEL MY ORDER?

Of course! You can cancel an order with no penalties. We do ask that you cancel your order within 24 hours of creating it or the cancellation may not be applied. If the item has already been shipped, please email support@peakflowfitness.com. Please send us an email with the subject line “CANCEL". We can cancel any orders that are not processed. Please reach out to us as soon as possible if you do decide to change your mind. Once an order is processed, there cannot be any cancellations. All cancellations are subject to a credit card CC fee of 3.5%.

Refunds (if applicable)

All refunds, unless otherwise specified, must be sent to the return address specified below.

Once your return item reaches our warehouse and has been inspected and reviewed, your refund / return will then be verified. It usually takes 1 business day from when your package arrived for us to finalize your return. Once approved, your refund amount will be processed back to your original payment method. Please also note that it may take up to 5-10 business days for the refund to appear back in your account after we have processed it in our system. 

Late or missing refunds (if applicable)

If your refund has yet to be refunded to your original payment, please don't worry. First, we ask that you check with your bank account to see if the refund transaction is pending. A lot of times your bank or payment provider may have a processing time for refunds, so please allow 5-10 business days after we have refunded you on our system for it to appear in your payment method. We will always be happy to walk you through every step of the way!

Return Address:

1923 McDonald Avenue SUITE # 1022

Brooklyn, NY 11223

United States

STILL HAVE A QUESTION?

If we were unable to answer all of your questions, please do not hesitate to contact us at  646-921-5221.