[ Masamune's Swords in SB3 ]
Reference - here
影秀 - "kagehide" - [ phantom excellence ]
牙龍 - "garyuu" - [ fanged dragon ]
爪破 - "souha" - [ destruction claw ]
応龍 - "ouryuu" - [ dragon of acceptance ]
暴走無頼剣 - "bousouburaiken" - [ the sword of the escaping hoodlum ]
影秀無銘 - "kagehide mumei" - [ phantom excellence | anonymous ]
影秀山吹 - "kagehide yamabuki" - [ phantom excellence | name of gold coin (in ancient Japan) ]
[ note: the kanji for "kage" is a bit different since the one in the art book is only the first radical. I assume it's the archaic way of writing "kage" since I couldn't find it at all on my Japanese language processor, but it essentially means the same thing.
Also, all the characters have a "mumei" and "yamabuki" sword as their two strongest swords. ]