---
product_id: 400106561
title: "SIHOO Ergonomic Office Chair with 4D Arms, 2-Way Lumbar Support - Adjustable Seat Depth - PU Headrest – Height-Adjustable Backrest – High-Back Computer Desk Chair (Black)"
brand: "sihoo"
price: "¥137854"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/400106561-sihoo-ergonomic-office-chair-with-4d-arms-2-way-lumbar
store_origin: JP
region: Japan
---

# 5cm adjustable seat depth for personalized seating 5-position backrest tilt for versatile comfort 4D adjustable armrests for perfect fit SIHOO Ergonomic Office Chair with 4D Arms, 2-Way Lumbar Support - Adjustable Seat Depth - PU Headrest – Height-Adjustable Backrest – High-Back Computer Desk Chair (Black)

**Brand:** sihoo
**Price:** ¥137854
**Availability:** ✅ In Stock

## Summary

> 🖥️ Elevate your workspace comfort — because your back deserves the VIP treatment!

## Quick Answers

- **What is this?** SIHOO Ergonomic Office Chair with 4D Arms, 2-Way Lumbar Support - Adjustable Seat Depth - PU Headrest – Height-Adjustable Backrest – High-Back Computer Desk Chair (Black) by sihoo
- **How much does it cost?** ¥137854 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/400106561-sihoo-ergonomic-office-chair-with-4d-arms-2-way-lumbar)

## Best For

- sihoo enthusiasts

## Why This Product

- Trusted sihoo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Customizable Armrests:** 8-gear height and 2.5cm depth adjustments ensure your arms stay supported in every task.
- • **Premium Build Quality:** Reinforced steel frame and electroplated aluminum feet deliver durability with a sleek, modern aesthetic.
- • **Dynamic Backrest Angles:** Choose from 110° to 140° tilt settings to switch seamlessly between focus, relaxation, and power naps.
- • **Tailored Lumbar Support:** 4D lumbar adjustment molds perfectly to your spine curve, reducing fatigue during long workdays.
- • **Effortless Setup & Warranty:** Assemble in 20 minutes with multilingual guides and enjoy peace of mind with a 3-year warranty.

## Overview

The SIHOO Ergonomic Office Chair combines advanced 4D adjustable armrests, customizable lumbar support, and a 5-position backrest tilt to deliver personalized comfort for professionals. Built with premium materials including a reinforced steel frame and PU headrest, it supports long hours of productivity and relaxation. Easy to assemble and backed by a 3-year warranty, this chair is designed to enhance your home or office setup with ergonomic precision and style.

## Description

Full description not available

## Features

- 【Ergonomic design】 The Y-shape backrest frame of the ergonomic office chair provides all-around elastic support and protection. The S-shape backrest is designed to fit for the spine curve, with a global designed hand feel as soft as a human body curve. The ergonomic office chair provides long-term comfortable and perfect support for all health-conscious users.
- 【Customized high backrest】 The 4D lumbar support can provide users with customized lumbar care. The 5-gear adjustable backrest can make users of all heights find their comfortable sitting postures, and the inclination of the desk chair can be adjusted to four angles, i.e., 110°, 120°, 130° and 140°. The office chair can be applied to various scenes such as working, entertainment, and rest due to flexible adjustment performance.
- 【Suitable for more people】 With the high-elastic sponge seat cushion, the office chair is adjustable in the depth of 5cm, providing people of various sitting postures with sufficient seating space. The mobile armrest has a supporting adjustable distance of 2.5cm, and it can be adjusted up and down, with eight gears. It is the right hand in the living room and study room at home, and the best choice for white-collar workers in offices.
- 【Delicate quality】 The big-size headrest with high-grade oil wax PU is adopted, to provide users with an environmentally protective and comfortable sitting experience. The reinforced full-steel hydraulic pressure rod has passed SGS and American BIFMA certifications. The precise electroplating aluminum alloy feet are attractive and durable, providing seats with high-pressure core support. It is the most trusted choice as a present due to the top-ranking workmanship and the original design.
- 【Simple assembly and three-year quality guarantee】 The computer desk chair is equipped with the image-text assembly description of multiple languages, and users can assemble it easily in only 20 minutes. Customer satisfaction is the driving force behind our progress. SIHOO home office chairs are free to return and refund within 30 days and come with a three-year free warranty. Please feel free to contact us if any problems arise.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | SIHOO |
| Model Number | V1-M109 |
| Colour | Black |
| Product Dimensions | 65 x 70 x 130 cm; 21.6 kg |
| Special Features | 4D armrest, 4D custom lumbar support, 5-position adjustable backrest, Adjustable sitting depth: 5CM, Ergonomic |
| Item Weight | 21.6 kg |

## Product Details

- **Brand:** SIHOO
- **Colour:** Black
- **Product dimensions:** 59D x 79W x 68H centimetres
- **Size:** With Footrest
- **Back style:** Solid Back

## Images

![SIHOO Ergonomic Office Chair with 4D Arms, 2-Way Lumbar Support - Adjustable Seat Depth - PU Headrest – Height-Adjustable Backrest – High-Back Computer Desk Chair (Black) - Image 1](https://m.media-amazon.com/images/I/71TXo-b3X+L.jpg)
![SIHOO Ergonomic Office Chair with 4D Arms, 2-Way Lumbar Support - Adjustable Seat Depth - PU Headrest – Height-Adjustable Backrest – High-Back Computer Desk Chair (Black) - Image 2](https://m.media-amazon.com/images/I/71FlTFxG3eL.jpg)
![SIHOO Ergonomic Office Chair with 4D Arms, 2-Way Lumbar Support - Adjustable Seat Depth - PU Headrest – Height-Adjustable Backrest – High-Back Computer Desk Chair (Black) - Image 3](https://m.media-amazon.com/images/I/71kEVKudN0L.jpg)
![SIHOO Ergonomic Office Chair with 4D Arms, 2-Way Lumbar Support - Adjustable Seat Depth - PU Headrest – Height-Adjustable Backrest – High-Back Computer Desk Chair (Black) - Image 4](https://m.media-amazon.com/images/I/61E56L7GnPL.jpg)
![SIHOO Ergonomic Office Chair with 4D Arms, 2-Way Lumbar Support - Adjustable Seat Depth - PU Headrest – Height-Adjustable Backrest – High-Back Computer Desk Chair (Black) - Image 5](https://m.media-amazon.com/images/I/71sUrsML3JL.jpg)

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**Shop now:** [https://www.desertcart.jp/products/400106561-sihoo-ergonomic-office-chair-with-4d-arms-2-way-lumbar](https://www.desertcart.jp/products/400106561-sihoo-ergonomic-office-chair-with-4d-arms-2-way-lumbar)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-12*