Okinawa escalated established naval methods

Aside from Operation Ten-Go and kamikaze attacks, did the Battle of Okinawa introduce a fundamentally new naval method or technology?

Little was genuinely new at Okinawa. The campaign chiefly applied established methods of naval and air attack with greater scale and effort.

Okinawa is better understood through intensity than novelty. Operation Ten-Go and kamikaze attacks were dramatic, but the wider battle mostly used methods the combatants already understood. The difference was the scale, persistence, and effort with which those methods were applied. That distinction provides the operational context for the later fleet and air-defense discussion.