Seo pays the attention to tanka & essay. By reading in the Amazon, it was impossible to read an essay. What was the essay? When a tanka is just a content. He gives decision. The exitence of the story to wait in the depths was important. ☆短歌はコンテンツの部類だと決定付けます。その奥に控えるストーリーこそが極めて重要だったのです☆