At 10:56 -0700 28/03/00, Krista Perry wrote:

Ryoga P Hibiki wrote:

 I never saw anything that said Kenshin was his only student, before or

 > after he studied under the old man.

Now, how does this relate to your fanfic?  Well, I'm willing to stretch
my willing suspension of disbelief, that, in this fusion, Ranma could
learn Hiten Mitsurugi Ryuu through a scroll, or through some master in
China, or whatever.  That's fine, I like the fic as you've got it, but
then I consider the fusion to be more Ranma than Rurouni Kenshin, since
the RK elements are so diluted.  I'm just saying that you can't base
this particular deviation from canon on the logic that Hiko might have
taught other students, because that's just not the case. :)

  For some evil reason, I feel like playing the Devil's Advocate (tm) on this matter, Krista...

  Spolier for the Kenshin series below!!!!
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This synopsis was taken from http://rka.crosspaths.net/  - The Ruroni Kenshin Archive.


Episode #67 Shining Legendary Sword! Mysterious Swordmaster, Amakusa Shougo. (2)

                               Shimabara Chapter. The Kenshin-gumi receives a letter from Misao. She reports on a murder mystery in Kyoto and a dead body with strange carvings on the flesh. Aoshi is approached by a man seeking protection from a written death threat. Aoshi refuses, but Misao sees the letter and takes it to Okina. Okina says the writing is either Portuguese or Dutch, and the symbol on the bottom of the letter was the same symbol carved into the body of the murdered man. Misao orders Okina to find out what the letter says. Okina goes to Aoshi with his findings, and Aoshi runs off to protect Misao. Too late. The man who asked Aoshi for protection is killed. Misao is struck with some sort of strange light and falls unconscious into Aoshi's arms. Shirojo shows up at the Kamiya dojo. He brings a message from Aoshi for Kenshin to come immediately to Kyoto. The Kenshin-gumi return to Kyoto. Misao is going to be okay, but Aoshi says her spirit was attacked. Kenshin recognizes the method as Shin No Ippou. Aoshi tells Kenshin that the attacker's style of fighting is Hiten Mitsurugi Ryu. Kenshin goes to visit Hiko, who was expecting him. Hiko tells Kenshin what he knows about Amakusa Shougo, a Christian swordmaster. Shougo is the nephew of a man called Hyoue, who failed to inherit the Ama Kakeru Ryu No Hirameki and was thought to have died, but did not. Hyoue then taught Hiten Mitsurugi Ryu to his nephew, Amakusa Shougo, and Shougo mastered the succession technique. Back in town, Cho has his men at the residence of another man who received a written death threat. The afternoon dies............


*** So it appears the the possibility of Hiko teaching the Hiten Mitsurugi Ryu to someone else isn't so far-fetched...  Granted, this is the anime series - I have no idea whether this storyline happened in the manga.