在渤海国研究中,渤海国是否是高句丽继承国问题,是国内外学术界争论的焦点之一。学术界对此发表出版了不少论著。虽论说颇多,但归纳起来,以如下三种观点为主:其一,渤海国创始人为靺鞨人,渤海国并非是高句丽的继承国;其二,渤海国创始人为高句丽人,渤海国是高句丽国的继承国;其三,渤海国创始人是靺鞨人,在与日本朝廷的交往中存在着“句丽继承国意识”。目前,主张渤海国是高句丽人创造并且是高句丽继承国的人,主要依据的资料,一是载于日本《续日本 Whether the Bohai State is the successor state of Goguryeo in the study of the Bohai Sea is one of the focal points in the academic circles at home and abroad. Academic published and published a lot of works on this. Although a lot of talk, but summed up, mainly to the following three points mainly: First, the founder of the Bohai Sea is a man, the Bohai State is not the successor state of Goguryeo; Second, the founder of the Bohai Sea for the Goguryeo people, the Bohai State is Koguryo Thirdly, the founder of the Bohai State was a widow, and there existed “Conception of Successor States in Korea” in his engagement with the Japanese court. At present, it is mainly based on the data that the Bohai Sea was founded by the Goguryeo people and is the successor state of the Koguryo. The first one is contained in Japan’s "Continuation of Japan