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Supports side-sleeping posture
Body pillow that
corrects sleeping posture
Supervised by a sleep specialist

Supervised by a sleep specialist
Supervised by Dr. Shintaro Chiba,
Director of Ota Sleep Science Center
Supports side-sleeping posture
Body pillow for positional therapy
Its medically-inspired design stably supports the side-sleeping posture, providing a high-quality sleep environment.
One in six Japanese
snores habitually.
While there are an estimated 9 million sleep apnea patients in Japan who require treatment, it is estimated that over 20 million people, including those with mild sleep apnea, snore.
However, over 80% of them
do not seek professional consultation.
A survey reports that over 80% of people with snoring problems do not seek professional consultation. The current situation is that snoring is often viewed merely as a noise issue, without considering its impact on sleep quality.
【Source】 Lancet Respiratory Medicine (2019) / Japanese Respiratory Society Clinical
Guidelines (2020)
Snoring is caused by a narrowed airway when sleeping on your back.
Snoring occurs because the muscles supporting the lower jaw relax during sleep, blocking the airway. When these muscles relax, the soft palate and the base of the tongue collapse due to gravity, narrowing the airway.
At the same time, breathing becomes shallower
Various problems caused by snoring and shallow breathing
Lack of deep sleep
Waking up many times at night
Chronic fatigue
Decreased concentration / lack of motivation
Severe daytime sleepiness
Tendency to feel down
Easily stressed
To reduce snoring, maintain an open airway with
side sleeping.
Achieves stable side-sleeping posture and
optimal full-body support with
4 Zones x 5 Layers
Supervised by a sleep specialist
Positional therapy does not work
if side-sleeping is not maintained.
Positional therapy through side sleeping is an evidence-based effective option for treating sleep apnea syndrome (SAS) in Western countries. However, when sleep deepens, people often unconsciously return to sleeping on their backs. This body pillow, which supports the posture from the back and waist to stably maintain side-sleeping until morning, helps to correctly implement positional therapy.
Director, Ota Sleep Science Center, Ota General Hospital Memorial Institute Clinic
Shintaro Chiba
Vice Chairman, Japanese Society of Sleep Research / Certified Sleep Specialist and Instructor, Japanese Society of Sleep Research / Certified Otolaryngologist, Japanese Society of Otolaryngology-Head and Neck Surgery / Former Visiting Researcher, Stanford University School of Medicine, Sleep & Circadian Rhythms Laboratory
Adjust your sleeping posture
for a quality sleep environment.
TECHNOLOGYTechnology
01SIDE SLEEPING
CORRECTION
Side-sleeping correction:
secure the airway, sleep comfortably
When sleeping on your back, the airway tends to narrow, which can lead to snoring and irregular breathing, reducing sleep quality. The design that supports a side-sleeping posture guides you to comfortable sleep.
Supports your back and waist
to correct side-sleeping posture
Supports your back and waist
to correct side-sleeping posture
It fits and supports your back and waist, aligning your sleeping posture and preventing tossing and turning. The design allows you to firmly hold it with your legs, maintaining a stable side-sleeping position.
For those seeking stronger correction
Securely fix the side-sleeping posture
with a belt
For those seeking stronger correction
Securely fix the side-sleeping posture
with a belt
To prevent the side-sleeping posture from collapsing due to unconscious tossing and turning during sleep, it is equipped with an adjustable fixing belt. This, combined with the back and waist support structure, maintains a stable side-sleeping position until morning, maximizing the effectiveness of positional therapy.
When not in use, it can be stored inside the outer cover.
Also pursuing comfort as a pillow
Also pursuing comfort as a pillow
We also emphasize comfort and functionality as a pillow, which are often overlooked in general body pillows. Its soft, moderately elastic fit maintains the natural curve from your neck to your back, ensuring comfortable sleep.
Comfortable to hug for relaxation
Comfortable to hug for relaxation
The soft and gentle embrace provides a sense of security. It also reduces strain on the lower arm, allowing you to sleep comfortably without pressure until morning.
02TEMPERATURE
CONTROL
Deep Sleep with Ultra-Breathable Material
The three-dimensional structure of our uniquely developed fiber ensures airflow. It prevents the buildup of body heat and moisture, supporting high-quality sleep in an ideal temperature environment.
Controls the Optimal
Temperature for Sleep
Controls the Optimal
Temperature for Sleep
The synergy between the highly breathable main body and the cover, made of a rayon-blend material with a smooth texture and excellent water absorption and diffusion, further reduces stuffiness. It controls the optimal sleep environment temperature throughout the night.
03COMFORT & CLEAN
Washable and Always Clean
While most body pillows cannot be washed to the inner material, Brain Sleep's body pillow allows you to shower-wash the inner material as well.
Note for care: Remove the outer cover and wash the inner cover by showering it with water. Do not remove the inner cover.
Outer Cover
Inner Cover
Resistant to mites and
house dust
Resistant to mites and
house dust
General urethane body pillows have poor breathability and tend to accumulate moisture and heat, making them susceptible to mites and mold. Brain Sleep's body pillows are highly breathable and composed of over 90% air, making them resistant to mites and mold, ensuring a clean state for a long time.
Smooth cover with no
seam irregularities
Smooth cover with no
seam irregularities
We use special sewing machines for baby products and competitive swimwear. There are no bothersome seams or snags on the skin.
Comfortable and just
the right coolness to the touch
Comfortable and just
the right coolness to the touch
The outer cover uses a cool-to-the-touch fabric, ensuring comfortable use.
Option
With smartphone
charging pocket
Option
With smartphone
charging pocket
Pockets for charging cables are placed on both sides. By placing your smartphone in the pocket on the underside of the body pillow, you can charge and secure it without interference during sleep.
MADE IN JAPAN
Commitment to Craftsmanship
Reliable Quality
MADE IN JAPAN
Commitment to Craftsmanship
Reliable Quality
Each mattress and pillow is carefully and repeatedly checked for quality by technicians and craftsmen.
After strict quality inspections, each item is carefully packaged and delivered to our customers.
Using natural spring water
with few impurities to prevent
quality degradation
Using natural spring water
with few impurities to prevent
quality degradation
The production process uses spring water from Shimizu Bakuen, a natural soft water with minimal impurities, designated as one of the "15 Famous Waters of Toyo no Kuni." By using water with few impurities, unnecessary chemical reactions can be avoided, preventing quality degradation.
Consistently supports your
sleeping posture,
for a high-quality sleep environment
SPECSpecifications
Size
Approx. 65-69 cm (W) × 165-178 cm (L) × 20 cm (D)
Color
Stone Gray
Material
Material
・Inner material: 100% polyethylene
・Inner cover: 100% polyester
Breathable/Antibacterial/Deodorant/Quick-drying/Odor-eliminating/Anti-static/Anti-mold/Pollen release
・Outer cover: 65% rayon, 35% nylon
Cool to the touch/Quick-drying
Comparison Table
FAQFrequently Asked Questions
Please tell me about the product's features and concept.
This is a body pillow supervised by Dr. Shintaro Chiba, director of the Ota Sleep Science Center at Ota General Hospital Memorial Research Institute.
It is a "back-supporting type" body pillow that helps correct posture for side sleeping, as part of positional therapy for people with snoring or sleep apnea syndrome.
How do I use it?
1. Place the longer part of the body pillow behind your back and lie on your side.
2. Cradle the body pillow between your legs from the back, and adjust its position so that the back portion fits snugly against your back and waist.
3. Embrace the shorter part of the body pillow and sleep.
How do I use the belt?
Pull out the belt from the hole in the outer cover and use it.
Lie on your side with the longer part of the body pillow behind your back, and hold the body pillow between your legs from the back. Adjust it so that the back of the pillow fits snugly against your back and waist, then fasten the belt.
Adjust the belt length so it's neither too tight nor too loose. If you feel any pressure or discomfort, immediately remove the belt.
Is it necessary to use the belt?
No, it is not essential. The body pillow can support side sleeping even without the belt.
We recommend using the belt for those who want to maintain a side-sleeping position more securely or those who struggle to stay on their side. Please choose according to your own situation.
How do I clean it?
【Outer Cover】Can be washed in a household washing machine
・Close the zipper, place in a laundry net, and wash separately.
・After washing, immediately reshape and hang to dry in the shade.
・Tumble drying and bleaching are not allowed.
【Filling】Can be rinsed with water using a shower while still in the inner cover.
・After rinsing, wipe off moisture with a bath towel or similar, and lay flat in a well-ventilated area to air dry in the shade.
・Do not remove the filling from the inner cover.
・Washing machines, dryers, and irons cannot be used.
Please tell me about the material and components of the main unit.
Filling: 100% polyethylene
Outer Cover: 65% rayon, 35% nylon
Inner Cover: 100% polyester
What are the dimensions?
Main unit: Diameter 30cm (width) × 20cm (height) × 30cm (length) (Filling approx. 2.7kg)
What is the country of manufacture?
The filling is made in Japan, and the cover is made in China.
Is there a warranty?
There is a one-year warranty from the date of purchase. The warranty applies to the filling only; covers are covered only for initial defects.
There are dents and hollows on the surface. Is it defective?
No, there is no quality issue. Due to the nature of the material, slight dents may appear in areas subject to heavy load, but this is a characteristic of the product.
Also, there are various sizes of holes or hollows on the surface and inside to promote ventilation, which are also not a quality issue.
The fibers are fraying.
The tubular fibers may soften and unravel with use, or fray due to snagging, etc.
If you are concerned, do not pull forcibly, but carefully cut the protruding fibers with scissors. There is no problem with the quality or texture, and you can continue to use it as is.
How should I store it?
When not in use, store it in a flat place away from high temperatures and humidity, where no weight is applied from above.
Avoid storing it in direct sunlight or in high-temperature locations.
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