The study of “The Literature of Christianity” is not only any writer’s study related to the Christianity but also is not the study to check the literature from a standard point of the Christian church history and doctrine. The investigation about the human redemption, which has been studied among the novels that attracted readers’ favore after the introduction of Protestant in Japan, has a characteristic originality different from the preceding studies until nowadays. The only study that the readers of those days had been aware of a general idea about the human redemption based on the Christian culture in any form is to be thought to give a precise answer of “What is the Christian Literature?” The writer of this study is to suggest a core point that 『KAIKO』, the works of writers whose novel is called a “Christian literature” up to now and the famous writer’s works are compared to study the problems of human redemption.