Goodgulf:
For an invasion of Pearl Habour - with spanking (either explicit or implied) - check out Harry Turtledove "Days of Infamy" series. It's just two books long and looks at what could have happened if the Japanese marines had been sent to Pearl (as one plan called for) rather than their historic target. First thing - the carreers couldn't do their early withdrawal and later waves got all the strategic targets that were historically missed (including the fuel depo).
As for spanking, it wasn't what you would call consensual. Think American "pleasure girls" being kept in line by the belt and how collaborating women would be treated on liberation day (sent down a gauntlet made up of those who didn't collaborate).
All in all, a good read (if very skimpy on the spanking) where the Doolittle Raid was over Hawaii rather than Tokyo.
Goodgulf
The gauntlet run by former collaborators in THE END OF THE BEGINNING was much more serious business than mere spanking IIRC, since at best the people enduring it were repeatedly punched and kicked (but AFAIK not intentionally on their buttocks) and at least one of them--the Chinese woman who rather brutally oversaw the 'comfort women' during the Japanese occupation--was tripped and then pummeled to death by her previous victims.
In the long run, the superior American productive capacity ended up overpowering the Japanese forces, in spite of their initial capture of the Hawaiian Islands in Turtledove's 'alternate history.' What I found to be well developed was the contrast between the courage in combat of the Japanese soldiers, sailors and pilots, which was admirable of and by itself, and the savagery of the Japanese occupation policy, which involved the commission of war crimes.
For those people interested in history and especially World War II buffs, IMHO it would definitely be a worthwhile read... --C.K.