Only hoshu has the right' to give Jonin go (name) or Nichigo, the same condition as to give rights of honzon shosha ken (rights to make a written copy of the principle images) and kyogi saitei-ken (right to judge doctrines).
上人号・日号等の授与権は、本尊書写権や教義裁定権と並んで「法主のみの権能」とされている。