...While it seems that the so called joke was at the expense of
japanese civilians - I doubt there would be much loss of sleep over this by many former POWs of Jap style hospitality - or the relatives of captured USAAF aircrew first paraded naked around Tokyo prior to execution by decapitation - or those bayoneted on the operating table at Singapores Alexandra BMH while Chinese student nurses were herded into an adjacent
building and burnt to death - or the hundreds of Chinese civilians gunned down as they were forced into the sea off Changi - or those survivors of
a Jap sub who lined the survivors along the deck only to also suffer
decapitation - To list but half of further WW2 Jap attrocities would
require a volumn or two at least.
...