A different text, the "Kaijo Monogatari" (dated to 1666) differs considerably from the "Nitenki" version. 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. After his defeat, he then went to Mount Hōman-zan in Chikuzen (near Fukuoka), where he practiced considerably, changing his preferred weapon to four "shaku" and two "sun" in length - 1.27 meter as compared to 1.21 meter. This school was called the Shintō Musō-ryū because of Gonnosuke's previous training under Sakurai Osuminokami Yoshikatsu of the Shintō-ryū.