Japanese submarine minelaying against American ports

What if Japanese carrier submarines had been minelayers used against Pearl Harbor and other American ports?

They could create a major disruption and force port closures, but the United States would respond with massive, sustained minesweeping operations.

Mined entrances to Pearl Harbor and other ports could be a serious operational shock. Channel closures and ship losses would impose real friction on American logistics. The United States could answer by expanding minesweeping forces and maintaining continuous clearance operations, turning the threat into an expensive but manageable burden.