As Japan was an island nation, the country needed to protect its waterways to ensure that goods, materials and fuel continued to flow into the country and power its mighty economy. Due to their alliance with the United States, the Japanese could get access to some of the finest in military hardware. Among the military equipment the Japanese military bought over the years, the list included the SH-60J Seahawk helicopter. Equipped with sonar buoys and capable of carrying torpedoes as well, the SH-60J Seahawk helicopters fulfilled the requirements of the Japanese Maritime Self-Defense Force.   

When Godzilla made his return appearance in 1984, the SH-60J Seahawk helicopter joined in the search alongside the HSS-2Bs and the P-3 Orion Maritime Patrol planes as they searched for the nuclear leviathan. They had little luck, though, as Godzilla managed to slip by the Japanese Self-Defense Forces to attack the Ihama Nuclear Plant.

Later on in the crisis, three Seahawk Helicopters flew over the waters of Tokyo Bay with their sonar buoys deployed as they attempted to find the King of the Monsters. In fact, they did find him as Godzilla rose unexpectedly in front of one of them and let out an enormous roar before he began his march on Tokyo.