Korean History › Late Joseon › Admiral Yi Sun-sin
Battle of Myeongnyang
October 26, 1597· Battle· Wars & invasions
Well documentedSolid records, physical evidence or scientific consensus.
Yi Sun-sin's 1597 stand in a narrow tidal strait, where 13 Korean ships turned back a Japanese fleet ten times larger.
See it on the Korean History map →What happened
After the disaster at Chilcheollyang, Yi Sun-sin had 12, then 13, panokseon; he famously told the court, 'I still have twelve ships.' He chose the Myeongnyang strait (명량 해전), 'Roaring Channel,' between Jindo island and the mainland, where tides race and few ships fit abreast. About 130 Japanese warships came on. Yi's flagship held the front for hours; when the tide turned, the Japanese lost about 30 ships, including commander Kurushima Michifusa, and withdrew. No Korean ships were lost.
Why it matters
It kept the Japanese navy from sailing up the west coast during the second invasion and restored Korean control of the southwestern sea.
Think of it like
Like defending a building through one narrow doorway: a crowd can only come through a few at a time.
How we know
Yi's diary entry for the day and his report to the court; Japanese accounts confirm the losses, including Kurushima, but describe a smaller setback.
Still debated
Japanese fleet size (130 to over 300 counting support ships) is disputed; the story of an iron chain stretched across the channel is probably legend.
Connections (2)
▸Admiral Yi Sun-sin won Battle of MyeongnyangWell documented
The connection
Restored to command with a shattered navy, Yi Sun-sin rejected a court suggestion to give up the sea and fight on land. He picked Myeongnyang because its narrow width and fierce tides cancelled Japan's numbers, and he held the line in his own flagship until the current turned.
When and how
October 26, 1597, in the Myeongnyang strait off Jindo, South Jeolla; Yi's 13 ships against a fleet including Todo Takatora and Kurushima Michifusa.
How we know
Yi's diary entry for the day and his report to the court; Japanese records also note the defeat.
Debates and open questions
Why most of Yi's captains hung back at first, as his diary complains, and how much the tide alone decided the battle, are discussed.
▸Battle of Myeongnyang turned the sea war in Imjin War (Japanese invasions of Korea)Well documented
The connection
After Chilcheollyang, the Japanese navy seemed free to sail around the southwest coast to support armies pushing toward Seoul. Myeongnyang stopped that. Together with the Ming–Korean stand at Jiksan on land about ten days earlier, it pushed Japan back to fortified coastal camps in the south, where the war bogged down.
When and how
Autumn 1597 along Korea's southwest coast and in Chungcheong; Jiksan in mid-October, Myeongnyang on October 26.
How we know
Korean, Ming and Japanese records show Japanese forces falling back to coastal forts (waeseong) after these battles.
Debates and open questions
Japanese historians often present the pullback as a planned winter retreat rather than a defeat, so the battle's strategic weight is debated.