He was a member of the Gyeongju Seok clan, one of the noble clans that shared the Silla throne during the early Common Era. He was born in a small kingdom 1000 li northeast of Wa. His father, King Hamdalpa, was a king of this kingdom; his mother was a queen or princess of another kingdom, called Nyeo-guk 女国 "Woman Country." According to the Samguk Sagi, when he was born as an egg, his father considered it an ill omen and had it boxed and floated at sea. The egg floated past Geumgwan Gaya and landed east of Gyerim, where he was raised by an old man as a fisherman. His family is said to have taken over a high official's house by claiming to be metalsmiths. His birth year is unknown, but he was probably an old man when he assumed the throne, having married the daughter of King Namhae of Silla in the year AD 8. He was offered the throne as successor to the second king Namhae, but the older Yuri served as king first. Yuri in turn designated Tal-hae his successor. Hogong is chief retainer who served for establishment of Silla. He also founded Kim Alji who is the founder of Kim clan in Korea. He got involved to three royals who are founder of Silla. He has Japanese origin. Tal-hae also came over by ship. The location of his birth place Dapana Country is estimated as somewhere in the Japanese archipelago. It is precisely estimated some part in Sea of Japan side or Kyushu. According to Kenichi Kamigaito, as it is a myth, other lines would be mixed, but Tal-hae of Silla was a King of Tanba province and he made jade there. He reached Silla by following a trade route. Even though excluding details of myth, it can be assumed that clan Seok had trade with Japan. On the other hand, there is a view that Ryongseong-guk listed in Samguk yusa has been regarded as a nation of Ainu, and Tal-hae has been regarded as a citizen of Ainu.
Reign
In 64, the rival Korean kingdom Baekje attacked several times. Silla battled the Gaya confederacy in 77. According to legend, in 65 the infant Kim Alji, ancestor of the Gyeongju Kim family, was found by Hogong in a golden box in the royal Gyerim forest. Tal-hae named his kingdom Gyerim at this time. A tomb believed to be Tal-hae's is located in northern Gyeongju City. The Gyeongju National Museum is constructed on the site where Tal-hae had a palace built.
