research result

Japan Research Laboratory of Sleep Science is developing the best bedding for each person while exploring the relationship between the human body and sleep.

In order to get a good night's sleep, it is important to choose pillows and mattresses that match your weight and body type. At our laboratory, we are developing functional bedding products that can more easily meet this condition, and we have our own equipment that can measure the sleeping posture and body pressure distribution measuring instrument that suits each person. We support the individual selection of pillows and mattresses.

Japan Research Laboratory of Sleep Science official website

The quality sleep brought by the mattress “AiR” was demonstrated in a joint research study conducted by Professor Fukubayashi, Tokyo Ariake University of Medical and Health Sciences and the Japan Research Laboratory of Sleep Science.

[ AiR ] supports sleeper’s body and allows smooth turnover during sleep thanks to a specially engineered bumpy urethane structure that supports the body with multiple protuberances. Sleeping on an excessively soft or hard mattress can be stressful for the sleeper, but “AiR” reduces stress to a minimal level and leads to a relaxing sleep.

Photo: Tokyo Ariake University of Medical and Health Sciences, Professor Fukubayashi


We performed experiments on mattresses by using an electromyograph to measure the activity level of seven muscles: e.g., greater pectoral muscle and posterior deltoid muscle (muscles that function when turning over in your sleep) as well as oblique abdominal muscle and quadriceps (muscles that play an important role in rotating the trunk of the body or bony pelvis). The assessment of the experiments revealed that the muscle activities were lower when lying on “AiR” compared with when lying on a softer mattress. In addition, the questionnaires filled out by the test subjects suggested that it is easier to turn over on “AiR” , and that the amount of time spent turning over tends to be shorter compared with harder and softer mattresses. (Toru Fukubayashi M.D., Professor, Tokyo Ariake University of Medical and Health Sciences )

Comparison data of turning over

  • <Muscle activity of the trunk of the body while turning over> Muscle activity of the trunk while turning over
  • <Time required for turning over> Time required for turning over
Toru Fukubayashi (Professor, Tokyo Ariake University of Medical and Health Sciences)

Professor Toru Fukubayashi, immediately after graduating from the Faculty of Medicine, the University of Tokyo in 1972, joined the Department of Orthopedic Surgery at the university. After serving as a M.D. at School of Medicine of the University of Tsukuba, he served as a professor in the Faculty of Sport Sciences, Waseda University. Since 2017, he has been serving as a project professor of Tokyo Ariake University of Medical and Health Sciences. He also currently serves as a sports doctor in the field, where he is involved in treatment and prevention of external injuries and disorders as well as rehabilitation of athletes who play sports such as soccer, judo, golf, and tennis.

  • Utilize sleep science.
  • "Bumps" change your sleep.
  • Body pressure distribution x Suspension of sleep posture
  • research result
  • [ AiR ] history