Yuzuyu (bathing with Yuzu) in winter.
There are a lot of customs in Japan and many of them are associated with healthy life. One of the examples is the yuzu bath in winter, known commonly as yuzuyu. It is said to improve blood circulation, guard against colds, warm the body, and cure neuralgia and pain in the lower back. I hope you will have an opportunity to enjoy this custom during your stay in Japan. But I also heard there are some people whose body do not agree with Yuzu, so please be careful if that’s not the case with you.