However, highly reliable historical documents indicating that the battle was fought actually, for example, "Myohoji-ki" (literally, records in Myoho-ji Temple), and kanjo letters (letters commending distinguished achievements in a battle) in the Takeda clan and those in the Uesugi clan, remain, and therefore, it is certain that fierce battles were fought in this area in this year.
しかしながら、『妙法寺記』や武田氏、上杉氏の感状など、この合戦があったことを伝える信頼性の高い史料は残っており、この年にこの地で激戦があったことは確かである。