He became Tsuibu Kyozokushi (Chief of the police officers who subdue the barbarians) in 941 and went to suppress FUJIWARA no Sumitomo's War with ONO no Yoshifuru, however the war was already suppressed by Yoshifuru and Tsunemoto only caught Sumitomo's aides, but this time as well, he was considered as Bukun (deeds of arms).
941年に追捕凶賊使となり、小野好古とともに藤原純友の乱の平定に向かうが、ここでも既に好古によって乱は鎮圧されており、純友の家来を捕らえるにとどまるが、それも武勲と見なされる。