Godzilla Vs. Gigan aka Godzilla on Monster Island

"Godzilla Vs. Gigan" starts the heavy use of recycled effect footage. Godzilla ends up with a lot of screen time, however a lot of that is stock footage or spent swimming. This movie was also a later release in the US not coming out till 1977 five years after it came out in Japan. And called "Godzilla on Monster Island" even though he spends very little time on said monster island.