It is a stand-alone three-headed lion that is said to have been transmitted when Satake changed his country to Akita.
In addition, there are two types, "Mito-type Sasara" that was transmitted at the time of the country change and "Southern-type Sasara" that was transmitted from Southern Shizukuishi via Hosendai. Lake Tazawa's Sasara is "Southern-type Sasara".