TOPICS 1 Rapid drop in temperature, winter arrives a month earlier than last year 2025 saw the hottest summer on record, with unusually lingering heat until October. However, November brought a sudden cold snap. Compared to the daily minimum temperatures during the same period in 2024, while temperatures in October were similar to last year, minimum temperatures in November dropped by more than 5-6°C compared to last year.※1 To manage one's health during such rapid temperature changes, improving sleep quality is crucial. Poor sleep quality leads to decreased immunity, making one more susceptible to infections like colds and influenza. It also leads to accumulated fatigue and reduced daytime performance. To stay healthy this cold winter, let's improve our sleep quality. ＜Year-on-year comparison of daily minimum temperatures in Tokyo for October and November＞ ※1 Japan Meteorological Agency Past Data https://www.data.jma.go.jp/stats/etrn/ TOPICS 2 Early Flu Outbreak This year's influenza season is the most widespread since the COVID-19 pandemic. In Tokyo, the alert level for the outbreak was exceeded in the week of November 3.※2 Last year, the alert level was exceeded in the week of December 16,※3 meaning this year's alert level was reached six weeks earlier than last year. Since vaccines begin to take effect approximately two weeks after vaccination, early prevention and countermeasures are necessary. Furthermore, as the air rapidly dries out this season, there are several ways to boost immunity, and getting quality sleep is one of the easiest to incorporate into daily life.Brain Sleep's annual sleep deviation survey, conducted on 10,000 people nationwide, revealed that approximately 70% of those with sleep issues experienced some form of poor health during the year※4. Conversely, among those without sleep issues, the percentage of people who experienced poor health was only about 20%. As this survey shows, when sleep quality declines, immunity also decreases. ※2 Tokyo Metropolitan Government "Influenza in Tokyo Exceeds Alert Level (November 13, 2025)" https://www.metro.tokyo.lg.jp/information/press/2025/11/2025111337※3 National Institute of Health and Crisis Management "Infectious Disease Surveillance Weekly Report (IDWR) 2024 No. 52" https://id-info.jihs.go.jp/surveillance/idwr/idwr/2024/52/article/index.html※4 "Sleep Deviation® Survey" 2025https://brain-sleep.com/pages/research2023 【SLEEP METHOD】 3 ways to improve your winter sleep, implementable immediately! 【POINT①】Get plenty of light in the morning and exercise during the day. Exposure to light in the morning resets your body clock. Melatonin secretion, which promotes sleep, begins 14-16 hours after morning light exposure, leading to smoother sleep onset at night. Also, this season, opportunities for exercise tend to decrease due to the cold. Exercising in the evening, when core body temperature is likely to rise, and then lowering it in response makes it easier to fall asleep. 【POINT②】Finish bathing 90 minutes before bedtime. It's easier to fall asleep when your core body temperature drops, but winter is a season where the body gets cold and core body temperature is less likely to drop. Core body temperature has the property of dropping as much as it rises. If you bathe for 15 minutes at around 40℃, your core body temperature will drop over the next 90 minutes, allowing you to fall asleep smoothly. If you don't have time, soaking your feet in a footbath can help with cold extremities and promote heat dissipation. 【POINT③】Choose bedding with high heat retention and breathability. Cold can hinder sleep onset and cause middle-of-the-night awakenings, reducing sleep quality, so bedding with high heat retention is recommended. However, even in winter, we sweat about a cup's worth overnight, so use breathable materials. By incorporating bedding with high moisture absorption or high moisture-activated heat generation, you can sleep comfortably throughout the night. 10 functions in a single filling! The ultimate winter duvet that surpasses down"BRAIN SLEEP Comforter Perfect Warm EX" Product Features This renewed product is an innovative winter comforter that uses granular filling instead of sheet cotton. The uniquely developed filling features "Carbonano Down," a patented material with 10 functions in a single granular filling, including antibacterial, anti-mite, and deodorizing properties. It has been renewed as a warmer, lighter, and more comfortable functional comforter. It is a unique comforter that combines warmth superior to down with lightness and fit. 1. 10 functions! Uses the uniquely developed granular filling "Carbonano Down" Carbon is processed into minute nanoparticles, specifically blended into fibers, and formed into granules. The granular filling, made of different sized down-ball-shaped granules, intertwines like down, allowing it to trap warm air. A single granule possesses 10 functions: moisture absorption and heat generation, far-infrared radiation heat, heat retention, moisture absorption and release, recovery elasticity, washability, anti-mite, low dust emission, deodorization, and antibacterial properties, making it a patented material. 2. 3D twin quilt structure prevents warm air from escaping. Cashmere and wool have a special scaly fiber structure that controls humidity by opening and closing. We developed this fiber structure from scratch, achieving a high level of moisture absorption and release to prevent stuffiness. Furthermore, it exhibits high heat generation by converting this moisture into heat. The integrated blanket prevents shifting during sleep, can be used without a cover, and eliminates the problem of duvets and blankets shifting when layered. In addition, Carbonano Down is added to the neck and foot areas, where people tend to feel cold during sleep, to prevent cold air from entering. 3. Washable without a cover. Can be kept clean at all times. It can be easily washed in a household washing machine or laundromat, so you can keep it clean. Furthermore, cotton lint generation was reduced by approximately 98% compared to down duvets. Newly developed material! Achieve ultimate fatigue recovery even with limited sleep time!Medical Device Wear "BRAIN SLEEP WEAR RECOVERY" Product Features Nominated for the 2025 buzzword of the year, the "recovery wear" market is steadily expanding. Brain Sleep's recovery wear utilizes a lightweight sweat fabric made from a uniquely developed new material called "MEDIC RECOVERY FIBER." Simply wearing it to sleep provides four beneficial effects: "fatigue recovery," "improved blood circulation," "alleviation of muscle stiffness and soreness," and "reduction of muscle fatigue," leading to ultimate fatigue recovery. 1. Unique development! New material "MEDIC RECOVERY FIBER" promotes blood circulation A uniquely developed recovery material in which several types of highly purified selected ceramics are blended and kneaded into the fibers at a high concentration. By enhancing far-infrared radiation with a special thread shape, it effectively warms the body and promotes blood circulation, achieving high recovery effects. 2. High moisture absorption & release and lightweight sweat fabric for a relaxed fit The outer surface is made of quick-drying polyester, while the inner surface uses a uniquely developed fabric of highly moisture-absorbent and breathable natural cotton and rayon. This sweat fabric is lighter than typical sweat fabrics, reducing the burden on the body. As sleep-specific wear, it does not impede necessary tossing and turning during sleep. 3. Quick-drying and antibacterial properties prevent bacterial growth, ensuring cleanliness and comfort It is quick-drying and dries quickly after washing, so you can wear it cleanly even on busy days. In addition, its strong antibacterial action, which is superior to regular antibacterial properties, prevents bacterial growth and deodorizes unpleasant sweat odors.
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