Ōkura Bakufu
In 1213 , when Wada Yoshimori rebelled against the Hōjō regents in the so-called Wada Kassen , his son Asahina Yoshihide stormed into the Ōkura Bakufu and burned it to the ground . 
<triplet> Wada Yoshimori <subj> Asahina Yoshihide <obj> child