Tokyo is the capital of Japan and the hub of the country's economic and administrative activities. To maintain the momentum of sustained economic growth, Tokyo is transforming the structure of its economic activities, production efficiency, and consumption patterns. Consequently, the supply and demand structure of energy and material in the city has been changing over time with a dramatic increase in the external dependency of supply. In particular, Tokyo depends on the supply of the Tokyo Electric Power Company (TEPCO), which has power plants outside of Tokyo's boundaries. However, TEPCO suspended its nuclear power plants for inspection purposes in 2003. Kashiwazaki-Kariwa Nuclear Power Plant was suspended following Niigata Prefecture Chuetsu-oki Earthquake in 2007; the Fukushima Nuclear Power Plant (the first and second power plants) was suspended following the Great East Japan Earthquake in 2011. In this study, we analyze the changes in the carbon mitigation responsibility of Tokyo, the capital of Japan, after the electricity supply shock caused by the nuclear power plant accident and examine how dependence on electricity supply affects CO₂ emissions. We compare CO₂ emissions in terms of 1) the changes in Tokyo's electricity supply, 2) the long-term changes in the local economy (flows of goods and services) in 1990, 1995, 2000, 2005, 2011, and 2015, and 3) different carbon accounting methods applied to consumption-based emissions. In this study, we have adopted a method that is based on four system boundaries to identify and compare per capita CO₂ emissions from 1990 to 2015 using data from Tokyo's statistical data. Results show that although CO₂ emissions associated with Tokyo's electricity consumption fluctuated significantly due to the suspension of the nuclear power plant, there was no significant change in Tokyo's consumption-based emissions. Since Tokyo's consumption structure has remained steady despite these major changes in electricity supply, we assume that Tokyo's emission responsibility will not change unless there is a major switch to lower carbon goods and services consumed in the city.

东京是日本的首都，也是该国经济和行政活动的中心。为了保持经济持续增长的势头，东京正在改变其经济活动结构、生产效率和消费方式。因此，随着时间的推移，城市能源和材料的供需结构一直在发生变化，供给的对外依存度急剧增加。特别是，东京依赖于东京电力公司 (TEPCO) 的供应，该公司在东京境外设有发电厂。然而，东电在 2003 年暂停了其核电站进行检查。柏崎刈羽核电站在 2007 年新泻县中越冲地震后暂停；₂排放。我们根据 1) 东京电力供应的变化， ₂ ) 1990 年、1995 年、2000 年、2005 年、2011 年和 2015 年当地经济（商品和服务的流动）的长期变化，以及3) 不同的碳核算方法适用于基于消费的排放。在这项研究中，我们采用了一种基于四个系统边界的方法，使用东京统计数据中的数据来识别和比较 1990 年至 2015 年的人均 CO _{2排放量。}结果表明，虽然CO ₂由于核电站的停产，东京的用电量相关的排放量大幅波动，东京的消费型排放量没有显着变化。尽管电力供应发生了这些重大变化，但由于东京的消费结构保持稳定，我们假设东京的排放责任不会改变，除非该城市消费的低碳商品和服务发生重大转变。