This is what we have, they *are* Japanese Hornets, the Japanese make videos of them fighting other nasty buggers, for instance a scorpion:
These hornets are over 2” long, sort of tiger striped, have a 1/4” stinger, very hard shelled. They attack wasp nests, kill and eat the wasps then eat the larvae in the nest. They’re not particularly aggressive towards people unless provoked, and you really don’t want to provoke them.
Oh my gosh! Do I feel badly for you. European Hornets are bad enough. I don’t want those to make it up here. Read they kill quite a few people every year in Japan because, like killer bees, they defend their nests by attacking in droves. Also read as few as 5-10 stings could kill a person, and their stings literally melt away the flesh around the wound.