Abstract
As effectiveness of climate policy is enhanced by nationwide/worldwide implementation, examining the relationship between
effectiveness and diffusion of local climate policies is important. This paper takes up a “GHG Emission Reporting System”
as one of the well diffused measures among local governments, and clarifies its effectiveness and state of diffusion. A literature
survey and interviews to local governments’ officials suggests as follows. Firstly, the system created by Tokyo Metropolitan
Government (TMG) has been updated three times. The third one is much more effective than the similar system of the
government and the other local governments. Second, the system has been updated partially by the government and some
local governments however it has diffused in “degradation” which is minus something from TMG’s system in totally. Thirdly,
one of the backgrounds that such state of diffusion comes out is industrial structure. Enough communication with the industrial
sector is needed especially for the local governments with high ratio of industrial sector in GHG emission to determine
effectiveness and feasibility of the system. Forth, local governments are not necessarily motivated to introduce high effective
policy due to carbon leakage until the government prepare a role-sharing arrangement which yield practical benefit for them.
