The Japanese government is taking a bottom up approach to reduce HFC consumption in Japan that is opposite of the EU approach. This presentation will explain the merit of this approach. In addition, it introduces how Japanese HVAC&R related academia and industries are cooperating to respond to the new regulations. In Japan, implementation of lower GWP HFCs already started in mass production base from smaller products. The total sales of products with A2L refrigerants exceeded 5 million. The presentation will also include projected HFC consumption reduction impacts.