Dr Saito-Director, Department of Applied Mechanics and Aerospace Engineering and Prof. Yabase from Waseda University, Japan visited TERRE Policy Centre on 5th March 2018. Dr Saito gave a presentation on heat pump while Prof. Yabase spoke on natural refrigeration. They explained how Thermodynamic heat pump cycles or refrigeration cycles are the conceptual and mathematical models for heat pumps and refrigerators. They are working on the application of Heat pumps and natural Refrigeration in India. The meeting was concluded by Dr Vinitaa Apte, President TERRE by giving the introduction and working principle of both Refrigerator and the Heat pump is exactly the same. She said in both the cases heat is transferred from a body at low temperature to a body at high temperature on account of Input work.