I took two items to have the possibility to forge the weapon, but when I go forge and click on the item I want to forge does not appear the necessary items to create it. Does anyone know the reason ??

Screenshots
http://prntscr.com/ek0okd http://prntscr.com/ek0plz

Make sure Yoshitsune is the right level, and make sure you've got the quest to smith first.