Complex sentence: In it, Gonnosuke is a boastful and brash warrior who duels Musashi (intending to see how Musashi compares with Musashi's father in swordsmanship) in Akashi, not Edo, and wielding a staff four "shaku" in length and reinforced with steel rings.
Split into simpler sentences: In it, Gonnosuke is a boastful and brash warrior who duels Musashi intending to see how Musashi compares with Musashi's father in swordsmanship. The fight occurs in Akashi, not Edo, and Gonnosuke wields a staff four "shaku" in length and reinforced with steel rings.