百济王氏是日本古代的一个氏族，其祖先是百济末代国王义慈的儿子百济王善光。

在7世纪中期，唐朝与新罗结盟，百济则与倭国结盟，以对抗唐朝和新罗的势力。义慈王将自己的儿子丰璋和禅广（又称善光）送往倭国做人质。660年，百济为唐朝、新罗联军所灭。倭国立丰璋为百济王，并送丰璋归国即位。然而倭国、百济联军在白村江战败，丰璋被俘流放岭南。百济复国的梦想就此破灭，不少百济人选择流亡倭国。

扶余义慈的儿子善光作为唯一一个在倭国的百济王子，于664年得到了天智天皇的允许，在摄津国难波一带附近创建百济郡（今大阪市天王寺区东部），以统治百济的遗民。691年，又被持统天皇赐予「百济王」的氏，这就是百济王氏的起源。

The Kudara no Konikishi (Japanese:百済王) was a Baekje-origin clan in Japan whose founder Seon Gwang (善光 or 禅広, pronounced Zenko in Japanese) was a son of the last king of Baekje, King Uija.

Kudara was an uji or clan name that represented their country of origin. Konikishi or Kokishi, which literally means "king", was a special kabane that was given only to the former royal families of Baekje and Goguryeo including Shōna (肖奈) and Koma (高麗) clans.