Samurai Miyamoto Musashi defeats Sasaki Kojirō in a duel at Funajima island.

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.

Ganryū-jima is an island in Japan located between Honshū and Kyūshū, and accessible via ferry from Shimonoseki Harbor (下関港).

April 13 is the 103rd day of the year in the Gregorian calendar; 262 days remain until the end of the year.