Eda Tokuji was the Administrator of Kanan Irrigation from 1921 to 1930. In 1921, he retired from the governmental office, then he was not a bureaucrat. He could manage the organization very well because he had long experience on that work. He always had many good subordinates of this project as Hatta Yoichi. He took severe criticism from some scholars, persons concerned of the sugar industry and politician. He was often criticized for his getting high salary when many farmers of the area suffered from high burden for the cost of the system. He was also criticized in that he didn't say actually. Still, he was also estimated very well from many people. Eda advertised the business eagerly to Taiwan and Japan. For the purpose, he wrote about the business to some journals. He sometimes detonated the joy in the business. He had many troubles very much for the business, then he died only after 2 years of the completion of Kanan Irrigation. After 6 years of his death, Hatta greatly praised him and his ability.