In Japan, A. mellifera is not viable because susumebachi (sparrow wasps -- insanely huge) invade the hive and they can't protect against it. Local honey costs about $20 a lb here as a result.
They don't necessarily get in. They hang around the entrance. European honey bees try to attack them one by one and there isn't enough poison to take it down. The asiatic honey bee attacks all at once and actually smothers it. All the action happens outside the hive.