While at Johns Hopkins, he was granted an assistant professorship at his alma mater, the Sapporo Agricultural College, but was ordered first to obtain a doctorate in agricultural economics in Germany. He completed his degree after three years in Halle University and returned briefly to the United States to marry Mary Elkinton in Philadelphia before he assumed his teaching position in Sapporo in 1891. When he returned to Japan, he had published books in English and in German and had received the first of his five doctorate degrees.