With such perfect hindsight why not instead start rearming earlier and introduce the draft in 1935?
Treasury. Party politics. Better to adjust to reality and plan for what can be done inside the constraints.
This see off Germany before they can even start
It could have been done several times, in the Rhineland, during the Anschluss, the Sudetenland Crisis, or when the Russians were rebuffed or when Poland kicked off. (Actually, one wonders if Stalin would have handed the BM "brass knuckles" during the Polish campaign and said: "Let's you and them fight, and I'll kill the winner.")
Italy is better able to id the only winning move (that is to not play) and Japan does not get the opportunity of a massive and very sudden geopolitical shift to even start to think about threatening war with the Western powers.
Japan is running out of oil and they have two options. Stop the China War or go grab the oil.
Stop China War.
Russia will see Japan as weak and eventually attack or China will unite and then attack.
Grab the oil?
Flip that coin. Both coin sides have tails. IJG hopes for heads.
Tails, they lose.
As for the Pearl Harbour lesson - which I assume you mean its too far away from Japan to be invaded? - Singapore is almost as far from Tokyo (5300 kms) as Pearl Harbour is (6200 kms)
Indochina is less than 1000, km away. Camranh Bay. Fleet anchorage and Class III French naval base. Well within range. Also Pearl Harbor was raided. And
View attachment 627974
Called Bath-tubbing. RIKKO says "hi!"
Without French Indochina being occupied by Japan in mid 1940 Singapore is a fairly safe base - as safe as Pearl Harbour - from invasion anyway.
See map. See Thailand? Worry.
And before France and the Netherlands was defeated (removing the French fleet from the balance sheet and in some respects possibly adding elements of it to the other side) and the Italians (adding their fleet to the other side of the balance sheet) the RN and RAF probably could have sent a sizable force to the Far East along with greater ground forces along with France and the Netherlands.
Never happen. EVEN under those conditions, the RN staff, judged their means to hand was inadequate in a straight fleet square-off. as in British battleships (their metric) were inferior to Japanese battleships and that the Japanese could bring an 11 to 7 (actually with the "R"s 11 to 5 based on speed gauge) surplus in offense/defense into region compared to what the RN could safely risk out of Europe. That is why from Backhouse forward, the British kept asking the Americans for "help".
Even Leahy was not that stupid and told the British "No." Stark? The idiot swallowed the kool-aid.
And Japan has to keep its eye firmly to the East at the USA - the main threat.
And how did that work out? (^^^)
And even with the Dutch and French effectively removed from the equation and the British badly distracted and over stretched - one does have to wonder what the Japanese leaders were smoking?
See here, again.
Japan is running out of oil and they have two options. Stop the China War or go grab the oil.
Stop China War.
Russia will see Japan as weak and eventually attack or China will unite and then attack.
Grab the oil?
Flip that coin. Both coin sides have tails. IJG hopes for heads.
Tails, they lose.