Emperor of the Sea (Korean: 해신; Hanja: 海神; RR: Hae-sin; literally "Sea God") is an epic South Korean television drama series starring Choi Soo-jong, Chae Shi-ra, Song Il-kook، Soo Ae and Chae Jung-an It aired on KBS2 from November 24, 2004, to May 25, 2005, on Wednesdays and Thursdays at 21:55 for 51 episodes.

The period drama is based on Choi In-ho's 2003 novel Hae-sin, which depicts the life of Jang Bogo, who rises from a lowly slave to a powerful maritime figure who dominated the East Asia seas and international trade during the Unified Silla dynasty.

[1][2] The series was received extremely well, holding the number one spot in the ratings for majority of the weeks it aired.

[7][8] Jang Bogo (Choi Soo-jong) rises from a lowly slave to the military commander of the sea during the Unified Silla dynasty.

Along the way, he battles pirates, and engages in a heated rivalry with Madam Jami (Chae Shi-ra), a Silla noble who squares off against Jang Bogo for trade rights in the South Sea.