These features are commonly seen in the kondo-butsu statues (gilt bronze Buddhist statues of the Three Kingdoms period of the Korean Peninsula); it is highly likely that the hibutsu of Zenko-ji Temple came over to Japan from the peninsula in quite ancient times.
これらの特色は朝鮮半島の三国時代の金銅仏にもみられるものであり、善光寺の秘仏本尊がかなり古い時代に朝鮮半島から渡来した像である可能性は高い。