Although in 2011 Japan finally decided not to participate in the second commitment period of the Kyoto Protocol to the United Nations Framework Convention on Climate Change, under the principles of sustainable development and common but differentiated responsibilities, it has probed the ways in which the ‘ultimate objective’ of the UNFCCC will be realized in the international community. With regard to socalled ‘emissions trading,’ since the middle of the 2000s, Japan has continuously adopted various methods and approaches for domestic emissions trading at local and central government levels. This article analyzes Japan’s recent efforts in introducing emissions trading schemes and finally refers to the Joint Crediting Mechanism, which covers the period until a future new agreement under the UNFCCC comes into effect.

This paper examines the early operation of the Kyoto Protocol’s non-compliance procedure since 2006. Several important non-compliance cases recently or currently before the Kyoto Compliance Committee of the procedures and mechanisms deserve to be analysed and discussed. As we may see, the enforcement branch of the Compliance Committee has dealt with some important cases of non-compliance; Among them, from the viewpoint of interpretation or application of international environmental treaties, the question of compliance by Croatia would be particularly interesting. What must be noticed is that the Kyoto Protocol’s NCP has prepared a multilateral forum which enables both the parties and the enforcement branch to base their arguments on international legal perspectives. This examination will also contribute to contested theories of compliance with international legal rules.