wrongswords were designed to de-limb people...aka major bone structure. A good one can hit the hardest of the hard and keep on truckin.
"green" bone isn't really all that hard. Try and cut a piece of dried bone and you're in for a rude awakeining. I wouldn't use any sword, differentially heat treated on anything but green bamboo or soaked tatami mats. Even with good technique you can have a "whups" moment and mess one up. A student at the dojo I attend recently did just that cutting tatami ,not only was it twisted but it also had a lateral bend in the blade--it's junk now.
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