Bafflingly absurd to suggest a permanent seat at the council could be forfeit over such a matter. These seats are occupied by the victors of the last world war, and will continue to be so until the results of the next one.
Beware the overwhelming Eurocentrism of WWII history as well, China was heavily involved throughout the duration of the conflict and took 3-4 million military casualties with 7-8 civilian casualties in the Pacific theater of WWII, second only to Russia (ignoring the losers).
Same applied to japan and china.