Kakuteizuka

Japanese: 角抵塚 - かくていづか

...Because there is no corresponding Chinese character in Hangul, it is considered to be a traditional sport unique to the Korean people. Historically, it is said to date back to the 5th century, and as evidence, there is a mural of a wrestler in the tomb of Goguryeo at Gakdeichong (now Ji'an, Jilin Province, China), which is considered to be the prototype of the oldest Korean-style ssireum. Currently, the ssireum played in the Republic of Korea (South Korea) and the Democratic People's Republic of Korea (North Korea) is in the style called "left ssireum," in which a single cloth belt about 3.6 meters long called sappa is twisted and wrapped around the thigh of the right leg and tied in front, which becomes the belt. ...

From [Dance Mound]

…A Goguryeo tomb from the Three Kingdoms period located in the Tonggou Plain at the southern foot of Mount Ru in Ji'an County, Jilin Province, China. It is famous for its murals depicting dancing, and the two tombs are adjacent to the Kakutei Tomb, separated by about 4m to the southeast. In the center of the square earthen tomb, which is about 15m on each side and over 3m high, is a cave-type stone chamber that opens to the southwest. …

*Some of the terminology explanations that mention "Kakuteizuka" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ハングルでの表記に相当する漢字がないことなどから，朝鮮族の固有の伝統的なスポーツであると考えられている。歴史的には，5世紀ころまでさかのぼることができるといわれ，その証拠として，当時の高句麗の墳墓である角抵塚(現，中国吉林省集安)に力士を描いた壁画があり，これが最も古い朝鮮族の流れを汲むシルムの原型であると捉えられている。　現在，大韓民国(韓国)ならびに朝鮮民主主義人民共和国(北朝鮮)で行われているシルムは〈左シルム〉というスタイルであり，サッパと呼ばれるおおよそ3.6mの一本の布帯をねじり，右足の太股部分に巻き付けて，前面で結び，これが帯となる。…