Hall of Masters

Yi Sun-sin

이순신

Joseon admiral undefeated in the Imjin War; author of the war diary Nanjung Ilgi

49 records in all

  • Principles 18
  • Episodes 27
  • Quotes 4
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Episodes

4 basic records of 27

Episodes are real events from public sources, summarised by us.

  • The Battle of Hansan Island

    Yi Sun-sin used the 'Hagik-jin' (crane wing) formation for the first time in a naval battle. He lured the Japanese fleet into the open sea by feigning a retreat, then surrounded and destroyed them with superior firepower.

    LessonInnovative tactics combined with psychological baiting can overcome a numerically superior opponent.

  • Reinstatement and the 12 Ships

    After the navy was nearly destroyed under Won Gyun's command, Yi Sun-sin was reinstated. Despite the government's suggestion to abolish the navy, he resolutely declared that he still had 12 ships and would fight on.

    LessonA leader's conviction can revive a failing venture even when resources are at their absolute minimum.

  • Securing International Support

    The victory convinced the Ming Chinese government that the Joseon navy was still viable, leading them to deploy their own fleet to aid Yi. Previously, the Ming had kept their ships stationed only at their own ports for defensive purposes.

    LessonProving your competence under pressure is often the prerequisite for securing major partnerships or external investment.

  • The Legacy of Nanjung Ilgi

    Yi Sun-sin maintained a personal war diary known as Nanjung Ilgi during his service. This document preserved the strategic and personal details of the naval conflicts for future generations.

    LessonDocumenting your business journey creates a valuable knowledge base and a lasting brand legacy.

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