Oil and gas tanks located in Osaka Bay are highly vulnerable to a tsunami if a Tokai-Nankai-Tonankai earthquake occurs and the consequential tsunami attacks that area. Being inspired by ecologically friendly mangrove and giant-kelps, it has been found that flexible pipes have the capability to reduce wave energy and flow velocity. In this paper, the use of flexible pipes for the reduction of tsunami damage on oil and gas tanks is investigated by means of an experimental and numerical approach. For the experimental study, scaled-model experiments are conducted in the tsunami basin using scaled model flexible pipes and oil and gas tanks. The tsunami-like wave is generated by the dam break method. Flow velocity in front of and behind the flexible pipes, as well as hydrodynamic forces acting on the model tanks are measured. Experimental results suggested that, from approximately 30 percent to 44 percent of maximum hydrodynamic force could be reduced by the application of flexible pipes. In the numerical approach, 3D CFD simulations are performed for the arrangement of flexible pipes and oil tank, similar to the experimental conditions. A tsunami-like wave is generated by the dam break method and simulation of the flow field is done by solving RANS equations in the open-source CFD toolbox, OpenFOAM. The simulation results show good agreement in terms of flow velocity and hydrodynamic forces acting on the oil tank. (C) 2017 Elsevier Ltd. All rights reserved.