Gojoseon Emperors Timeline

Gojoseon - Songhwagang Period
Uhyeonwang(右賢王) Godeung(高登)'s grandson Saekbulu made a cou de'tat and became 22th dangun

Gojoseon - Jangdanggyeong Period
Notes: [1] Whether Gija Joseon and Wiman Joseon actually existed is a matter of controversy. Korean scholars deny its existence for various reasons.