Could Japanese aircraft have dropped mines in Pearl Harbor and its channel during the attack?
Short answerPotentially, especially in a third wave, because mine drops could be concealed within the confusion of the bombing and threaten later ship movements.
NotesMine-laying is most plausible as part of the often-discussed third wave at Pearl Harbor. Aircraft dropping mines during a general bombing attack could exploit defenders' expectation that every falling object was another bomb. The danger might not become clear until damaged or surviving ships began to move through the harbour channel. One visible form of attack could therefore conceal a different weapon whose effects appeared later.