The mark consists of a wording of musashi, with all letters in upper-case, and letter M is with a tiny gap in the middle, letter U and S are overlapped a little bit, and left part of letter A is a long stroke like a blade.
The name(s), portrait(s), and/or signature(s) shown in the mark does not identify a particular living individual.
The English translation of Musashi in the mark is Possession or storehouse of martial arts.