Kiyoaki KITO says in "Kaya wa naze horonda ka" (Why Gaya Collapsed) that a ruling family of Alla called itself Wafu and engaged itself considerably in the political decision making of Gaya region and Baekje, but denies its role as an institution to collect contributions or to directly rule the area.
鬼頭清明は『加耶はなぜほろんだか』の中で、安羅の豪族が倭府と称し、伽耶地方や百済の政治決定に重要な関与をしていたことは認めたうえで、貢調徴取の機関でも直接支配の機関でもないとしている。