I everybody !

Mmmh, so the story, from what I can remember, is about a guy and his sword.
If I remember correctly, his grandfather was some kind of blacksmith who forged a magical sword, or something like this.
The sword can transform in a beautiful woman.
The young guy was like very good at swordsmanship, but stopped practicing for whatever reason.
He starts to train again after meeting the sword/girl.
And of course he meets lots of other sword-girls and the bearer.

Some other details pop into my mind while thinking of this, but I can't be sure if I'm not getting confused and mixing together stories from more that one manga...

Thanks for you help !

I didn`t read the manga but just guessing maybe XBlade ?

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maybe kandachime

I think it's XBlade, although the sword is not forged by his grandfather. Other description fits except the grandfather thing. As far as I know, the male lead doesn't have family anymore.

Maybe The Sacred Blacksmith. That's the only thing that came in my mind.

Oh.... thanks guys, my mind was just confused... it seems I just took the 3 stories and mixed them together as one...

So thanks a lot, now I have 3 manga to read with lots of chapters available

nokianve is correct it's kandachime.