Hokkaido University Research Profiles

Japanese

sleep: 1

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  • Basic Research to Design Healthy Life Rhythms Considering Biological Clocks

    Japanese people sleep less than the global average, and the economic loss due to sleep disorders is estimated to be about 6 trillion yen per year. At our laboratory we specialize in chronobiology, which is the study of the biological clock, which is deeply related to sleep. Our goal is to contribute to the health of the nation by promoting research of chronobiology.

    Research

    The biological clock is an important biological strategy that regulates our behavior (timing of sleep and wakefulness) and our body’s internal environment, so that we can be fully active during the day and get good sleep at night. However, in today's society, many of us are forced to live against our biological clocks due to night shifts, jet lag, 24-hour work schedules, and so on. In order to lead a healthy life throughout our lives, we need to understand the structure and function of our biological clocks, and actively design and optimize our life rhythms according to our life stages and individual lifestyles. At our laboratory, we are studying the mechanism of the effects of light and exercise on the biological clock, the development of effective nutritional dietary guidance methods based on chrono-nutrition, and the relationship between seasonal variations in sleep and biological rhythms and physiological functions.

    Yujiro Yamanaka Associate Professor
    Ph.D. in Medicine