A system that certifies greenhouse gas (GHG) emission reduction and absorption performance in Japan as "credits." J Credits are used as a mechanism to support the achievement of carbon offset and carbon neutrality in Japan, and GHG reduction and absorption activity such as energy conservation measures, introduction of renewable Energy , and forest conservation implemented by companies and local governments are traded on the market as credits with monetary value. Companies working to reduce emissions can purchase these credits to supplement their own GHG emission amount. In addition, sellers of credits can use the profits from sales to invest in further environmental conservation activity and technology development.