The Japanese government has tightened foreign investment rules for power companies. As per the revised law, the threshold that foreigners are allowed to hold an equity stake in Japanese-listed companies has been reduced from 10 per cent to 1 per cent in sectors deemed critical to national security, including electricity and nuclear facilities. Foreign ownership above the threshold will be subjected to a pre-screening process. This will apply to transmission and distribution utilities, and generation utilities with capacities of 50 MW and above.