I completely agree. But I’m looking at it as the Japanese would have seen it. They perceived our embargo and the presence of our army personnel and naval warships in Hawaii as a threat. They didn’t really want a war with the US. They mainly wanted us to go away and leave them alone.
I think your case depends entirely on the determinations that the Japanese wars were just wars (
jus ad bellum) conducted justly (
jus in bello).
I go back to the rapist/killer analogy. Does one who is committing evil acts have a moral right to bomb the police station out of fear that the station presents an imminent intervention to the mayhem?
Here’s another scenario. It could be argued that the Fort Sumter attack was a preemptive strike. South Carolina had seceded. They saw the federal military base on their territory as a threat. They had offered to buy the property, but the federal government refused to sell. I’m sure they felt that they had no choice but to attack and forcibly seize the installation. Which the Union saw as an unjust and illegal act of war.
The point here is that claiming preemptive military action can be morally justified isn’t really saying anything. Because anyone feeling aggrieved enough to initiate such an action believes his cause is just.
What one "feels" or believes I do not think makes an act moral. Perhaps, if we disagree on that fundamental premise furhter dialogue will not be productive. Do you really believe that any act is moral if anyone feels it is so?
As to Fort Sumter, the attack on the federal installation can only be justified if the proposed criteria are met:
1) The potentially unjust aggressor's manifest intent to mortally injure others
2) The potentially aggressor's objective acts that enable effecting their malevolent intent
3) The potential target's lack of action greatly magnifies the risk of their mortality
As to #1, I find no evidence that the federal fort had manifested any intent to mortally harm the citizens of Charleston. Are you morally entitled to shoot me if I refuse to sell my house to you?
As to #2, absent an expressed (not assumed) malevolent intent this criteria is not useful.
As to #3, absent an expressed malevolent intent, a preemptive attack is never justified.
Major Anderson's move from Fort Moultrie to Fort Sumter was a defensive, not offensive, tactic and as such was not a provocation. It should also be noted prior to the attack on Fort Sumter, the federal government, in its effort to resupply the Fort, was attacked and fired upon by cadets from the Citadel.