In 1696, 8 Koreans drifted to
Ezochi, a historical term used in Japan to refer to the region now known as Hokkaido. One of this group, Lee Ji-hang, described his experience after returning to Joseon.
"Pyojurok" and
"Lee Jihang Pyohaerok" provided scholars of the Realist School of Confucian thought with rare information about the area called
Hai (the sound of Chinese characters in Korea called
Ezo) in the 18th century, and greatly influenced the formation of the perception of
Ezochi in the late Joseon Dynasty. Although their origins are unclear, both records describe Lee's brief biography in the preface prior to his experience in Hokkaido. This paper attempts to estimate the time when Lee’s biography was added to both records as a preface based on the social background of the late Joseon Dynasty. Lee Ji-hang passed the
Mukwa examination in 1675, but was not yet appointed to the government post he held in 1696, when he drifted to Hokkaido. According to
"Seungjeongwon Ilgi, the Diaries of the Royal Secretariat", he was appointed to the sixth rank of government in 1720 after returning to Joseon. Because the preface of
"Pyojurok" and
"Lee Jihang Pyohaerok" records that he rose to sixth rank, it is estimated that the preface was added to both records after 1720.
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