In Japan, the rules of insurance was established in the Commercial Code since 1899. After then, Japan has become one of the most industrialized countries in the world, and its population has been progressively growing older. So, this old rules of insurance was facing some new challenges in these years, for example, how to protect an insurant. In the past several years, Japan had been particularly involved with efforts at improving its insurance law. And Japan had to find some solutions for these new challenges, and to make some innovation. In 2008, the Insurance Act in Japan was enacted with to be more contemporary writings. The main purpose in this new insurance law is to be written in an easy style for the people who repeatedly ask their insurance law to be necessary and reasonable. And then, Japan launched its new insurance law in recognizing that it is a key in a modern safe society to protect an insurant. In this paper, I would like to focus two-important topics in this new insurance law, as follows, ① what is the intention of the new insurance law, ② how the new insurance law is to protect an insurant. These innovations in the new insurance law should and will be an example that other countries follow in the future.