Abstract
This Study shows a feasibility of Japan's long-term mitigation target, reducing Greenhouse Gas emis-sion by 80% by 2050, considering a constraint of the key low carbon technologies diffusion. The results indicate that unavailability of CCS is crucial to achieve the long term reduction target. Notably, crude steel production process by blast furnace become one of the largest emitter without CCS. In contrast, phase-out of nuclear power and constraint of renewable energy have relatively less impact. However, if both of them are unavailable or constrained, carbon price to achieve the long term reduction target rises substantially. To examine a national climate policy, it is important to consider uncertainty of key low carbon technologies such as CCS and renewable energy as well as nuclear power.
