Takanobu was an excellent painter of portraits and it is described in "Jingo-ji Ryakuki" (An Abbreviated Record of Jingo-ji Temple) that the portraits such as those of MINAMOTO no Yoritomo, TAIRA no Shigemori, and FUJIWARA no Mitsuyoshi which are stored in Shingo-ji temple are national treasures which were painted by Takanobu.
隆信は似絵（にせえ・肖像画）の名手で、神護寺所蔵の国宝・源頼朝像・平重盛像・藤原光能像などの肖像画は『神護寺略記』に隆信の作と伝えられている。