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Komada Lab
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The lab investigates how sleep and biological rhythms affect the mind and body.
AboutAbout the lab
Scientific and social research on sleep and biological rhythms
The Komada Lab studies sleep and biological rhythms from both scientific and social perspectives.
It clarifies how sleep debt and disrupted biological rhythms, which are widespread in modern society, affect physical and mental health.
On that basis, it proposes solutions at the individual, societal, and environmental levels.
Its themes include social jet lag, women's health and sleep, children's sleep, and sleep-related eating disorders.
Key terms
- sleep debt
- A state in which small daily sleep shortfalls accumulate over time, like a debt
- biological rhythms
- Changes in bodily functions, such as body temperature and hormones, that repeat on a roughly daily cycle
- social jet lag
- A jet-lag-like state caused by a gap between sleep and wake times on weekdays and on days off
NewsLab news
View More ↗ResearchResearch themes
The lab clarifies how sleep debt and disrupted biological rhythms, which are widespread in modern society, affect physical and mental health, and proposes solutions at the individual, societal, and environmental levels. Its research is divided into five themes: sleep debt and social jet lag; sleep, biological rhythms, and reproductive health; society, environment, and sleep; children's sleep; and sleep-related eating disorders.
*Illustrative imageSleep bound by society's clock
Living on a schedule set by work and school start times cuts into sleep most for people with evening-type body clocks. The lab analyzes how sleep and meal rhythms changed when remote work spread during the COVID-19 pandemic and the constraints of social time loosened.
*Illustrative imagePregnancy, menstruation, and sleep
To protect women's physical and mental health, the lab investigates the relationship between sleep, the circadian clock, and the course of a woman's life. This includes sleep problems during pregnancy and their relationship to childbirth and postpartum depression, changes in blood glucose levels with the menstrual cycle and aging, and sleep during menopause.
*Illustrative imageProtecting children's sleep
Children tend not to get enough sleep because of staying up late and smartphone use. The lab reviews how children's sleep is measured and how it relates to academic performance, and is expanding efforts to improve sleep, such as sleep lectures held at schools.
MembersFaculty
The members of the Komada Lab consist of faculty, students in the doctoral, master's, and bachelor's programs, research assistants, and project members.As of 2025
- ProfessorYoko KomadaPublications ↗
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Shumuko LabSchool of Environment and Society, Department of Social and Human SciencesShamisen, music analysis, and Japanese traditional musicThe information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Alarm clock on a chair (Unsplash)” Szűcs László szucslaszlo / CC0 (cropped)
- Sleep bound by society's clock: “Classic alarm clock 20180513” Santeri Viinamäki / CC BY-SA 4.0 (cropped)
- Pregnancy, menstruation, and sleep: “Polysomnography model” Clinique Somnomed / CC BY-SA 4.0 (cropped)
- Protecting children's sleep: “Romania-1687 - Children's Bedroom ( )” Dennis G. Jarvis / CC BY-SA 2.0 (cropped)
- Related lab (永岑研究室): “Cortisol-3D-balls” Ben Mills / Public domain (cropped)
- Related lab (多久和研究室): “Light spectrum on a wall caused by sunlight going through prism and then through handmade glass” Pittigrilli / CC BY-SA 4.0 (cropped)
- Related lab (佐久間研究室): “Muskel ( 1)” Rollroboter / CC BY-SA 3.0 (cropped)
- Related lab (シュムコー・
コリーン・クリスティーナ研究室): “Chuzao-Hosozao-shamisen” Ryukei / CC BY-SA 3.0 (cropped)
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