The Japanese diet is rich in calcium, with sources including seafood, tofu, sesame seeds, leafy greens, and dairy products. Milk is still a popular beverage in Japan despite low consumption of dairy products, but most milk is ultrahigh-temperature treated which can decrease nutrient levels. Calcium supplements are readily available in Japan and traditional remedies such as horsetail herb tea and umeboshi plum are believed to be beneficial for bone health. Calcium-fortified foods are also becoming increasingly popular. Despite the diet being rich in calcium, osteoporosis remains a significant health concern in Japan due to an aging population and changing dietary habits.