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Unable to Sleep in Tokyo, but Sleeping Soundly in Tottori... Doctor Uncovers the "Real Culprit" Behind Insomnia Using Data From a Ring-Shaped Device.

What are the conditions for a good night's sleep? Dr. Risa Kirimura says, "I worked in Tokyo from my twenties and for many years thought I had incurable insomnia, but when I moved to Tottori, I was able to sleep soundly without any trouble. There was an unexpected reason behind this."
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What are the conditions for a good night's sleep? Dr. Risa Kirimura says, "I worked in Tokyo from my twenties and for many years thought I had incurable insomnia, but when I moved to Tottori, I was able to sleep soundly without any trouble. There was an unexpected reason behind this."

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PRESIDENT Online(プレジデントオンライン) broke the news on Monday, October 5, 2026.
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