It was written in "Chinyoki" (an account of the raising to the throne of the Emperor Gohanazono in 1429) by Imperial Prince Sadafusa, who was the retired Emperor Kogon's grandson, that Tsuneaki was one of the most important close aides to the Retired Emperor Kogon.
経顕は光厳上皇の側近中最も重んじられた1人であったことが光厳天皇曾孫貞成親王の『椿葉記』に記されている。