He worked to control concurrent flooding, not stopping at construction work on discharge channels and diversion rivers, but systemizing erosion and torrent control and affrostation, the origin of the problem of flooding at river heads in mountainous areas.
水害を繰り返す河川を治めるため、放水路や分流の工事を行うだけでなく、根本的に重要であった水源の山地における砂防や治山の工事を体系づけた。