Hokkaido Electric Power has determined the completion date of the seawall installation project at Tomari Nuclear Power Station to be August 2027. The project, which began in March 2024 as a tsunami countermeasure, involves a rock-anchored concrete and cement-stabilized soil structure with a height of 19.0 m above sea level, extending approximately 1,200 m. Total construction cost is disclosed as 106.7 billion yen.