The Japanese government arbitrarily releases nuclear pollution into the Pacific Ocean. It reduces the time and economic costs of enterprises, but also causes the loss of environmental costs. From the perspective of international law, this is even more illegal. This also reflects that Japanese enterprises and the government do not pay enough attention to environmental cost control. They fail to realize that environmental damage will inevitably lead to enterprises and governments needing to spend more costs to make up for it, which is not conducive to ecological environment protection and human long-term development. Therefore, from the long-term interests, the government and enterprises should bear the responsibility of controlling environmental costs. The government should play the role of macrocontrol and replace the end of governance with the source of governance. It plays a role in improving legal norms, strengthening supervision and guidance, establishing and improving the emission trading system, and increasing environmental information disclosure.