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Musō Gonnosuke was a famous swordsman from the late Sengoku period.
Though he was someone Uesugi Tetsu would most likely never have met even after returning to the past, he had still studied this nominal "Katori Shinto-ryū swordsman" very carefully when doing his research.
The reason he was called that only nominally was that although Musō Gonnosuke had started out by training in Katori Shinto-ryū and had attained the rank of Menkyo Kaiden,
the life story of this famous swordsman made little further mention of Katori Shinto-ryū after that.
Instead, he first followed Matsumoto Bizen no Kami, the founder of Kashima Shin-ryū, and secretly learned the secret of "One Sword" from the essence of Ura Kashima Shin-ryū.
Then, after losing to the Sword Saint of that era, Miyamoto Musashi, he devoted himself to researching ways to defeat him.
Thus, Musō Gonnosuke traveled throughout the land, studying countless schools and taking their essence while discarding their flaws.
In the end, he combined spear arts, staff arts, swordsmanship, and more to create the one-of-a-kind Jōdō!
He also developed the secret technique Cross Brace, which was said to be capable of defeating Miyamoto Musashi, whom he had once encountered, and established Shinto Musō-ryū Jōdō!
Unfortunately, Musō Gonnosuke never encountered Miyamoto Musashi again.
Thus, the world had no way of knowing who would have won or lost if the two had fought again.
But at least, in Musō Gonnosuke's heart, he had already defeated the Miyamoto Musashi who had ruthlessly beaten him that day—and he had also defeated his past self.
That was enough.
Afterward, although Shinto Musō-ryū Jōdō was carried forward and even became a designated art of the All Japan Kendo Federation in modern times,
it had ultimately been created by Musō Gonnosuke specifically to deal with human swordsmen, so it was