To make it easier for webmaster to understand, I will explain by referring to historical evidence based on facts. 

Dokdo is recorded as the territory of Usan-guk, which was subjugated by Silla in the early 6th century (512), so the history of Dokdo's rule dates back to the Silla period. 

Dokdo has been our land ever since Isabu, the general of Silla, conquered Ulleungdo. 

However, from the end of the 17th century, Japan began to greedy Ulleungdo, including Dokdo, and cause conflict. 

Joseon had a fierce debate with Japan for three years, and eventually Japan recognized Dokdo as the land of Joseon in 1696. 

There is a famous anecdote here. In 1693, Ahn Yong-bok, a fisherman, was engaged in fishing on Ulleungdo, and the Japanese and the Japanese were taken to their home country with the fishing right in between. 

However, he strongly insisted on the issue of the Koreans went to Joseon territory to the Taesu of Hoki State. 

For this reason, the Edo shogunate returned him to Joseon, and on December 25, 1695, through an inquiry about the Tottori Domain, it was confirmed that "Neither Ulleungdo (Jukdo) nor Dokdo (Songdo) belong to the Tottori Domain" (Response to Tottori), 1696. 

On January 28th, the Japanese were ordered to ban travel to Ulleungdo Island.

Looking at these historical evidences, it can be seen that Dokdo belonged to the territory of Korea from a long time ago. 

There are numerous other evidences. 

I would appreciate if you read my article and correct any errors on this website. 

Thank you. 

Have a nice day.