In recent years, with the growth of networks and Internet terminals, various information can be searched at any time we want. It also highlights the fact that there are still plenty of things to be unsolved in the world through the Internet, and we are willing to devote more than ever to solve them. However, mind and healthy is the most important. For that, let's start with smiling, let's begin with making it smile. We say "the smiling door" in the proverb saying "Fortune comes to a smiling door" (Japanese proverb). It is our mission to spread the smile and make the world have more optimistic.