Skip to content

新デザインコンセプト「Authentic and Sustainable」を採用した新商品を発売開始いたしました

新デザインコンセプト「Authentic and Sustainable」を採用した新商品を発売開始いたしました

Language
  • 日本語
  • English
寝具のイワタ 寝具のイワタ 寝具のイワタ
Search Account 0 Cart
  • unbleached / Subscription
  • Items
    Duvet / Comforters
    Duvets / Down Comfoertes Down Blankets Others
    Mattresses & Mattress Pad
    Camel Hair Matress Pads Mattress Pads (All-year) Mattress Pads (Summer) Mat pad (for winter) Japanese Mattreses
    Beds
    Mattresses Bed Frames C-couch Daybeds
    Washable Pillows
    Sheets & Covers
    Sheets & Covers Duvet Covers Pillows Covers
    Others
    towel Warmer Support Pillows Mask Laundry Detergent Others
    Remaking
    Remaking / Our Products Remaking / Thired-party
    Read More
    RENMEN project Bed Frames made from Japanese Woods Camel Hair Linen Cotton Down
    unbleached
    Duvet / Comforters Mattresses & Mattress Pad Pillows Sheets & Covers Mattresses Others
  • Duvet / Down Comforters
    • Duvet / Down Comforters
    • Down Blankets
    • Others
  • Mattress Pads & Futon
    • Camel Hair Matress Pads
    • Mattress Pads (All-year)
    • Mattress Pads (Summer)
    • Mattress Pads (Winter)
    • Futon(Japanese Mattreses)
  • Beds
    • Mattresses
    • Bed Frames
    • C-couch
    • Daybeds
  • ふるさと納税
  • Our Shops
  • Journal
  • Event
    • Work Shop
    • IWATA Accommodation plan that delivers a good night's sleep
  • Our Vision
  • Customer Reveiws
  • Contact Us
Subtotal
¥0
Shipping, taxes, and discount codes calculated at checkout.
Your cart is currently empty.
  • unbleached / Subscription
      • View all
      • Duvets / Down Comfoertes
      • Down Blankets
      • Others
      • View all
      • Camel Hair Matress Pads
      • Mattress Pads (All-year)
      • Mattress Pads (Summer)
      • Mat pad (for winter)
      • Japanese Mattreses
      • View all
      • Mattresses
      • Bed Frames
      • C-couch
      • Daybeds
    • Washable Pillows
      • View all
      • Sheets & Covers
      • Duvet Covers
      • Pillows Covers
      • View all
      • towel
      • Warmer
      • Support Pillows
      • Mask
      • Laundry Detergent
      • Others
      • Remaking / Our Products
      • Remaking / Thired-party
      • RENMEN project
      • Bed Frames made from Japanese Woods
      • Camel Hair
      • Linen
      • Cotton
      • Down
      • View all
      • Duvet / Comforters
      • Mattresses & Mattress Pad
      • Pillows
      • Sheets & Covers
      • Mattresses
      • Others
    • View all
    • Duvet / Down Comforters
    • Down Blankets
    • Others
    • View all
    • Camel Hair Matress Pads
    • Mattress Pads (All-year)
    • Mattress Pads (Summer)
    • Mattress Pads (Winter)
    • Futon(Japanese Mattreses)
    • View all
    • Mattresses
    • Bed Frames
    • C-couch
    • Daybeds
  • ふるさと納税
  • Our Shops
  • Journal
    • Work Shop
    • IWATA Accommodation plan that delivers a good night's sleep
  • Our Vision
  • Customer Reveiws
  • Contact Us
Access Denied
IMPORTANT! If you’re a store owner, please make sure you have Customer accounts enabled in your Store Admin, as you have customer based locks set up with EasyLockdown app. Enable Customer Accounts

down

Feathers are collected from waterfowl such as geese and ducks. The fluffy, cotton-like tufts are called down.

They grow on the chest and belly areas of the bird and provide excellent insulation.

Feathers grow in greater quantities on other parts of the bird and provide elasticity and breathability. Down is mainly used for comforters, while feathers are used for pillows.

Feathers collected from farms go through a process of dust removal, washing, and drying before being refined. However, cleaned feathers are not enough on their own.

After refining the feathers, Iwata's special technology (Iozon α2) is used to remove impurities to the utmost degree, and the resulting material is used as the raw material for comforters and pillows.

Feathers before being refined

After iozone α2 (down)

After iozone α2 (feather)

The feathers are made using special technology to remove as much dust as possible and can be washed at home.

Waterfowl feathers contain various impurities such as bird dander and oil. If these impurities remain, they can emit unpleasant odors and have a negative impact on health. To address this, Iwata uses a special technology called Iozone α2 to remove impurities through several stages of processing, achieving maximum purity. Additionally, the feathers are sterilized, deodorized, and sanitized during the process.




neck feather

Neck feathers, which grow densely on the head and neck of waterfowl, have sharp feather shafts that can blow out through the smallest gaps in the fabric.

down fiber

These are feather branches separated from the down. It is torn off and in one piece, so it does not retain warmth.

feather fiber

Feather feather branches that have separated from the feather shaft and are torn off, leading to reduced heat retention.

immature down

This refers to down that has been kept as a waterfowl for a short period of time and is small and immature. The down is smaller and weaker, so it has less heat retention and is less durable.

dandruff

Fragments and feather shaft keratin on feathers. They cause odours and stains.

粉

Fine fibre fragments and dust that adhere to feathers during the breeding and refining processes.

The key to sleeping comfort is the maturity of the down.


The feel of down products is determined not by the down ratio, but by the maturity of the down. The maturity of the down is determined by the size of each down ball.

Each hair of down is called a feather branch, and mature down has more of these branches. Even small, immature down can increase the down ratio if there are a lot of them, but such small down has low insulation and does not provide warmth or good sleeping comfort.

At Iwata, strict quality standards are set and only products that pass the inspection are used.

immature down

Mature and big down

Only products that have passed laboratory tests are used.

Iwata has its own research institute, the Iwata Down Laboratory, which has supported Iwata's bedding production for many years. This laboratory carries out empirical research on bedding, including material analysis and product and technology development, and only highly safe materials that have passed the strict checks at this laboratory are used.

The fabrics are also very particular.

Generic down fabrics are resin-treated to prevent blowing out, so they could not be sun-dried or washed in water. Iwata has used its unique know-how to develop a fabric made from 100% natural cotton. Our technicians' eyes carry out meticulous checks to ensure perfect quality and delivery of our products.

Generic fabrics that are packed with resin or glue not only do not absorb moisture, but also inhibit the down's ability to absorb and dissipate moisture

.

Iwata fabrics instantly absorb sweat and moisture and do not interfere with the function of the down

.

    feather products

    Recently viewed
    camel products

    Camel hair is the hair of the Dipterocarpus camel, which inhabits the Gobi Desert and Inner Mongolia regions deep in Mongolia. Due to its harsh habitat, where temperatures can exceed minus 40°C during the cold season, its body hair has extraordinary functions such as heat retention, moisture absorption and moisture release.

    hemp products

    Linen is a fabric woven from fibres taken from the stems of the flax plant, a small plant. The fibres are fine and supple, and the more they are washed, the more they blend in.

    cotton products

    The fibres that make up cotton can be obtained from cotton, a member of the mallow family. After flowering beautifully, the fruit withers when ripe and overflows with white fibres (cotton balls).

    Invalid password
    Enter
    • About Us
    • Our Shops
    • Customer Reviews
    • Terms &Conditions
    • Refund Policy
    • Search
    • FAQ
    • Shopping Guide
    • My account
    Get in touch
    • 03-5989-0838
    • Email us
    • Send on LINE.
    • Instagram
    • Facebook
    We accept
    • American Express
    • JCB
    • Mastercard
    • Visa
    Language
    • 日本語
    • English
    © 2025 寝具のイワタ Legal NoticePrivacy Policy