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 date origin and development
Three-kingdom era (Gaya) It was named "Golpo"
757 (King Gyeongdeok of the Silla dynasty) Happo-Hyun established.
1282 (King Chungnyeor of the Goryeo dynasty) Hoewon-Hyun established.
1408 (King Taejong of the Joseon dynasty) Changwon-bu established.
May. 1, 1899 Masan port opened.
Apr. 1, 1914 Masan-bu established.
Aug. 15, 1949 The name was changed to Masan city.
Jul. 1, 1973 Part of Changwon-gun incorporated into Masan city.
Apr. 1, 1980 Changwon city created as separate entity.
May. 10, 1989 Happo and Hoewon branch offices opened.
Jul. 1, 1990 Happo and Hoewon branch offices changed to Happo-gu and Hoewon-gu, respectively.
Jan. 1, 1995 nified city of Masan city established.
Dec. 31, 2000 Happo and Hoewon branch offices discontinued.