Hating Shingen fiercely, Terutora dedicated a prayer titled "Harunobu TAKEDA's wrongdoings" in Kankinjo (a place to read sutras silently) in Kasugayama-jo Castle (located in Joetsu City, Niigata Prefecture) and in Yahiko-jinja Shrine (located in Yahiko Village, Nishikanbara County, Niigata Prefecture), and in the prayer, he abused Shingen in the worst possible terms, pledging to exterminate him without fail.
輝虎の信玄への憎悪は凄まじく、居城であった春日山城（新潟県上越市）内の看経所と弥彦神社（新潟県西蒲原郡弥彦村）に、「武田晴信悪行之事」と題する願文を奉納し、そこで信玄を口を極めて罵り、必ず退治すると誓っている。