Sword duel between Miyamoto Musashi and Sasaki Kojiro on the shores of Ganryū Island. Kojiro dies at the end.

Miyamoto Musashi , was a Japanese swordsman, strategist, artist, and writer who became renowned through stories of his unique double-bladed swordsmanship and undefeated record in his 62 duels. Miyamoto is considered a kensei of Japan. He was the founder of the Niten Ichi-ryū style of swordsmanship, and in his final years authored The Book of Five Rings and Dokkōdō.

Sasaki Kojirō , also known by his fighting name Ganryū Kojirō, was a celebrated Japanese swordsman of the late Azuchi–Momoyama and early Edo periods. Born in Fukui Prefecture, he founded the Ganryū school of swordsmanship, specializing in a distinctive long-sword technique most notably the famed Tsubame Gaeshi. He earned renown across Japan for his flamboyant style and formidable skill, reportedly serving as sword instructor to Hosokawa Tadaoki’s court.

May 13 is the 133rd day of the year in the Gregorian calendar; 232 days remain until the end of the year.