Welcome to the forum! Your comment about the Giant Japanese hornet intrigued me. I read on Wikipedia that
"When an Apis cerana hive is invaded by the Japanese giant hornet (Vespa mandarinia), about 500 Japanese honey bees (A. cerana japonica) surround the hornet and vibrate their flight muscles until the temperature is raised to 47 °C (117 °F), heating the hornet to death, but keeping the temperature still under their own lethal limit (48–50 °C). European honey bees (A. mellifera) lack this behavior."
What precautions did you have to take to make it through the hornet season?