Board Thread:Wiki Discussions and Support/@comment-26152226-20150323185045/@comment-26302001-20150325212021

Also another thing... there is no mention or presence of a Kinkaku force in the later wars, so it is most likely that Tobirama killed all 20 of them but died in the process, that makes it more clear than the Kinkaku force must have killed the KinGin brothers before they ended up against Tobirama.