You should try The sakabatō is a type of katana from Rurouni Kenshin, wielded by Himura Kenshin. It is a “reverse-edge sword”, translated in the English-language dub as a “reverse blade sword”. ... The only way for the sakabatō to cut is to rotate the hilt by 180 degrees within the hand, thus holding thesword backwards.
See: https://katanaswords.net/reverse-blade-katana/