On Christmas Eve in 1909, twenty-one-year-old Kagawa Toyohiko (1888-1960) rented a room in K be's worst slum where, apart from two years of study in the United States, he remained with his wife and co-worker Haru for more than ten years. They engaged in pastoral work, evangelism, social reform movements, and literary activities, founding numerous institutions that are still in operation today. After publishing a best-selling novel in 1920, Kagawa began to draw the attention of people from around Japan and the world. His literary output was prodigious, amounting to more than 300 books. Often...