Wani is a man who lived in ancient age. He is known for the man who teach japanese chinese character and give them some china books like analects(論語) and thousand character classic(千字文). His story is documented in detail the kojiki. In premodern age, the story of wani became the object of interest. and many scholars have researched his story. As a result, it has been criticized in many ways. Someone said that His story is not true or partially true. And someone said it is unquestionable true. In this discussion, story of wani also became the method of proving kojiki’s sincerity.