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People File • Historical

Sasaki Kojirō

Sasaki Kojirō was a Japanese swordsman of the late Azuchi–Momoyama and early Edo periods.

Updated August 1, 20261 min readCited sources

Sasaki Kojirō was a Japanese swordsman of the late Azuchi–Momoyama and early Edo periods, best known for his legendary duel with Miyamoto Musashi in 1612.

Who he was

Sasaki Kojirō, also known as Ganryū Kojirō, was a swordsman active around the turn of the 17th century. His birth year is commonly given as c. 1585, though historical records are uncertain. He is remembered primarily for his role in one of Japan's most famous sword fights.

The duel with Miyamoto Musashi

On 13 April 1612, Kojirō faced Miyamoto Musashi in a duel on Ganryū-jima. In the most widely repeated account, Kojirō was defeated and killed. The encounter has become a cornerstone of Japanese martial lore.

Legacy and historical uncertainty

Much of Kojirō's life blends history with legend, making his biography partly unverifiable. Despite this, he remains a prominent figure in Japanese swordsmanship narratives and popular culture, often depicted as the master swordsman defeated by Musashi.

In short

  • Sasaki Kojirō was a Japanese swordsman from the early 1600s.
  • He is best known for his 1612 duel with Miyamoto Musashi.
  • Historical details of his life are partly legendary.
  • His story remains influential in Japanese martial culture.

Quick questions

Who was Sasaki Kojirō?
He was a Japanese swordsman best known for his legendary duel with Miyamoto Musashi in 1612.
What is Sasaki Kojirō also called?
He is also known as Ganryū Kojirō.
How did Sasaki Kojirō die?
He was killed in a duel with Miyamoto Musashi on Ganryū-jima in 1612.

Sources

  1. Wikipediahttps://en.wikipedia.org/wiki/Sasaki_Kojir%C5%8D
    Supports: Commonly cited birth and death dates, alternate name, historical period, and association with the duel against Miyamoto Musashi.
  2. Encyclopaedia Britannicahttps://www.britannica.com/biography/Sasaki-Kojiro
    Supports: Identification of Kojirō as a Japanese swordsman and his association with Miyamoto Musashi.
  3. Samurai Tourshttps://samurai-tours.com/stories/sasaki-kojiro
    Supports: Summary of Kojirō's legendary status, uncertain birthplace, and connection to Musashi.
  4. Discovery UKhttps://www.discoveryuk.com/mysteries/who-was-sasaki-kojiro-and-what-happened-at-ganryu-island/
    Supports: General account of the duel, Ganryū-jima, and the legendary nature of Kojirō's story.