Although this might sound rather murky, since I have collected and read so many mangas that i forgot the title. This is a fighting manga, where the main character and sidekick, much like the two in shaman king. The main character employs a martial skill that is said to be long forgotten where he uses fingers as weapons to hit weak points and even dislocate joints. The main character is tutored by his grandfather, and I think his father has already died. Also this main character acts to protect his "sidekick's" dojo which was behind a new powerful rich acadamey dedicated to martial arts too. I think the new dojo was called dragon or something. Thankyou for your assistance.