Kagurabachi is a Manga in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.readkagurabachionline.com fastest updating comic site. The Summary is

Young Chihiro spends his days training under his famous swordsmith father. One day he hopes to become a great sword-maker himself. The goofy father and the serious son–they thought these days would last forever. But suddenly, tragedy strikes. A dark day soaked in blood. Chihiro and his blade now live only for revenge.