Rokuhara Tandai (六波羅探題) was the post of the chiefs of the Kamakura shogunate in imperial capital Kyoto whose agency, the Rokuhara (六波羅), kept responsibility for security in Kinai and judicial affairs on western Japan, and negotiated with the imperial court.
Despite keeping security, the Rokuhara were also a sort of secret police and widely feared.
[1] Rokuhara Tandai was set up after the Jōkyū Incident in 1221.
The two chiefs were called Kitakata (北方) and Minamikata (南方), respectively.
Like shikken and rensho, both posts were monopolized by the powerful Hōjō clan.