Japanese people are increasingly taking vitamins for various reasons, such as boosting immunity, maintaining good health and improving energy levels. Popular types of vitamins taken by Japanese people include Vitamin A, Vitamin B complex, Vitamin C, Vitamin D, Vitamin E and more. Taking vitamins can provide numerous health benefits such as improved immune function, better vision and increased energy levels. Popular vitamin supplements taken by Japanese people include multivitamins, individual vitamin tablets, liquid vitamin drops and chewable tablets. However there are some challenges associated with taking these supplements such as potential side effects or interactions between different medications/supplements/vitamins.