Masayuki Fukuhara (雅之福原 Masayuki Fukuhara, born August 6th, 1960) or Fuku-san as he is more commonly referred to by Ryo Hazuki, is a live-in student at the Hazuki Residence where he learns Martial Arts from Iwao Hazuki. He is slightly older than Ryo although despite this he doesn't seem to be as skilled, and a little clumsy at times.
On the day of the incident, Fuku-san was in the Dojo with Iwao when Lan Di arrived. Early on in the confrontation, Fuku-san is thrown out of the Dojo just as Ryo arrives, after this he passes out. As the days and weeks go by and Fuku-san comes to know what Ryo is trying to do, although Fuku-san thinks it's dangerous, he agrees to aid Ryo in whatever way he can. Even giving him his life savings so that Ryo can buy a boat ticket to Hong Kong. Fuku-san does slip up though, by telling Ine-san that Ryo is going to Hong Kong because Iwao's killers are there, despite this he does mean well and does want to help.
As Ryo is finally able to leave Japan for Hong Kong, he asks Fuku-san to take care of the Dojo for him which he, of course, agrees to.
Fuku-san also has a crush on Akemi Sato, the hostess at Bar Yokosuka. He frequently drinks there just to be near her. Before the incident, he came in quite often, but his grief and depression have prevented him from coming by recently