Considering most of the Naval War in the Pacific was in the tropics, it shouldn't be all that cold, really.
Alaska is sort of the exception.
It's already sortie time, right?Daaaang, it's freezing...!This design isn't really for winter at all, is it?I hear 'ya, Ricchan!That Ri-class is so late... What's she even doing?Ah, she's coming!Everyoneeeeee!HEEEEY!I've a real nice cold-protecting dealies for you!That's my Chi-class-neki! The woman who understands development well!Heeey!
You over there!
HEEEEY!Something is coming!A mascot character?Warming EquipmentSortieing in this getup really is just way too cold...!