So the first time I met Yoshitsune, I had that quest where I had to have her repair a weapon, so I clicked on her and did it. But now my weapon is broken again, and I don't know how to repair it. I'm assuming I'd have to click on Yoshitsune again, but I can't find either her or Shizuka, yet they're both in my party.

Is there some other method that I'm just missing, or something?

They are at the main area where you first spawn, beware of the traffic