Both stories revolve around a guy whose female companion can transform into a sword, which he then uses to fight supernatural evil forces.
There is this part about girl-sword transformation in both series (and it's the main reason for this recommendation) and in both there is some sort of conflict going on between organized groups of people (actually swords in Kandachime, but humans are involved too). Also, in both series the sword-girl is strongly attached to the male lead.
When Akira Narikawa was a boy, he communicated with the spirits of the swords that passed through his house. The grandson of a famous sword smith, he has grown to be a young man who doesn’t want to inherit the family business, and attends school instead. But Akira soon finds himself in the company of swords and their spirits once more, and with his special talents and kindness he always is able to calm what evil lies in wait. In addition to meeting new friends, Akira will touch the lives of many – both the living, and the dead.
Both series star a boy who can see the humanoid form of swords, and whom are skilled at polishing and sharpening swords. Additionally, the boys in both series come from families with a long history in the realm of swords, and both boys are reluctant to continue in their respective family's traditional jobs.
Funko, Shigu, Eru and Ichiroku seem to be typical school girls on the surface, but they're actually powerful, dangerous guns that must be treated with care and respect! Together, they attend Seishou Academy, a special place where not only are all of the students guns, the teachers are as well. That is, except for one new educator who arrives, unaware of the crazy, dangerous times that lie ahead!
Honoka Takamiya is a typical teenager; he does his classwork and admires Ayaka, the school idol, who sits next to him in class. But the boy's life changes forever when one day, a piece of the school falls on top of him and he's saved by Ayaka due to... her magical powers?! For Ayaka is a witch, and deeming Honoka to be 'her princess', she is determined to keep the boy safe from harm. Now Honoka must try to stay alive while countless other witches target him, learn more about Ayaka and her craft, and still try to maintain his school life in the process!
Something about the female lead in Kandachime reminded me of Ayaka from Witch Craft Works. Probably the fact that both are mostly emotionless, overprotective of, and strongly devoted to the rather useless male lead (at least that's how those guys are at the beginning). If you were looking for such female characters then both of those manga are titles for you.
As far as character design goes, each series involves a boy who wields an ancient sword which holds the spirit of a woman. This spirit can turn into a human and fight like an actual person. Both the main characters develop a super strong bond with their swords. After the main character learns, by real combat, he is far to weak, they then go under training. Smooth reading and interesting to see swords transform into unclothed women.