The word 'denso' had been established after the late Heian period but the post was established during Emperor Gosaga's insei period (during the period of the government by the retired Emperor) in the Kamakura period.
「伝奏」という語は平安時代後期以後に成立しているが、役職としての成立は鎌倉時代の後嵯峨天皇院政期である。