Sin Suk-ju

Timeline

1. 1443–1452Hanyang · KoreaPassed the jinshi examination in 1438 and soon entered Jiphyeonjeon, one of King Sejong's most trusted officials. In 1443 he, along with Seong Sam-un, Jeong In-ji and others, participated in creating Hunminjeongeum (Hangul), consulting Ming phonologists on several trips to lay the phonetic foundation of the new script. That same year he was envoy to Japan, negotiating on Joseon-Japan relations and wakō issues, famed for his Japanese-language diplomatic skill. After Sejong's death he continued at Jiphyeonjeon under Munjong (1450–1452), taking part in textual compilation and diplomacy.
2. 1453–1460Hanyang · KoreaWhen the Gyeyu Jeongnan broke out in 1453, Sin Suk-ju did not stand with the regent ministers but chose to support Grand Prince Soseong (Sejong), and was thereafter listed among the 'Jeongnan meritorious subjects' and rewarded. Unlike his colleague Seong Sam-un and the six martyred ministers, later Confucians criticized this as betrayal of righteousness, but it enabled his steady rise under Sejong, holding posts such as Vice Minister of Personnel and Minister of Rites. After Sejong's formal accession in 1455 he helped draft the initial framework of Gyeongguk Daejeon and repeatedly advised on diplomatic protocol with Ming, becoming a core figure of Sejong's civil administration.
3. 1460–1475Hanyang · KoreaServed repeatedly as Chief State Councillor under Seongjong (from 1469), the court's leading civil official. Completed Haedong Jegukgi in 1471, systematically recording the geography, customs and diplomatic relations of Japan and the Ryukyu islands, one of Joseon's most important geographical works on Japan. Also helped oversee the finalization of Gyeongguk Daejeon (promulgated 1485), an enduring contribution to Joseon law. Died in 1475, posthumous name Munjong, aged fifty-eight.