Korean Shinigijihwa and Hwacha

Timeline

1. c. 1550–1570Hanseong · Joseon dynastyBuilding on gunpowder technology exchanged with China and Japan, Korea made shinigijihwa by packing black powder and arrowheads into bamboo or paper tubes; they could be fired singly or in volleys from simple racks, used in city defense and naval warfare, laying the ammunition and craft foundation for later hwacha-style multi-barrel launchers.
2. c. 1571–1580Suwon area, Gyeonggi Province · Gyeonggi ProvinceDuring King Seonjo's reign, military equipment was overhauled and firearms production expanded; movable wooden frames and wheeled arrow carts were trial-produced in Hanseong and throughout Gyeonggi Province, each able to load dozens to over a hundred shinigijihwa, significantly increasing range and volley density over single rockets and accumulating craft experience for large-scale deployment before the Imjin War.
3. 1591–1598Sunchon, Jeolla Left Province · Jeolla ProvinceGenerals including Yi Sun-sin standardized the shinigijihwa and hwacha during the preparation period; after the war broke out in 1592, hwacha volleys suppressed enemy forces in siege and naval battles at Jinju, Sunchon, and Noryang, becoming a key component of Korea's coordinated land and naval firearms system.