After a fair bit of searching I was unable to find a thread for this. I started this thread to facilitate discussions on this excellent series.
I'll start off by asking a question that's been nagging me for a while. In Volume 6 the mangaka includes a short story about one of the previous Hiko Seijuros that he apparently wrote a few years before RK. In it he wields a sword called Fuyutsuki('Winter Moon') that is apparently an heirloom of Hiten Mitsurugi that has been passed down from generation to generation. Can anyone clarify whether it is the same sword that Hiko Seijuro XIII(Kenshin's master) uses in the series? It has a similar appearance but lacks the hilt inscription. Does the databook say anything about it?
EDIT: Nobody's responded...well I have another question; where did Shogo Amakusa(the filler villain from the 'Son of God' arc) learn the Hiten Mitsurugi? Hiko couldn't have taught him, since he said he wouldn't take another pupil after Kenshin.