First, I should verify if "Ryukendo" is a real anime. A quick check shows that it's not a well-known or recognized series in major anime databases. Maybe there's a typo? Perhaps they meant "Ryuu Kenden," but that's also not familiar. Alternatively, they might be referring to an obscure or independently produced anime. Alternatively, could it be a mistranslation or a mash-up of words? Maybe "Ryukendo" is being confused with another title.