To keep its monopoly, Tennoji so-za paid the tax in kind in an amount of as much as 562.5 kg annually to its honjo Sanjonishi family in exchange for the exemption from so-kuji that it paid when passing through the checkpoints.
その維持のため天王寺苧座は、本所である三条西家に対して通過時の苧公事の納入を免除して貰う替わりに年間150貫に及ぶ苧課役を三条西家に納入していた。