It has been confirmed that two kanjo letters exist on the Takeda side as well, but they were audited as fabricated ones by major researchers including Shunroku SHIBATSUJI, because the sentence style, the character style, and the handwriting style were dubious.
信玄側にも2通の感状が確認されているが、柴辻俊六を始め、主な研究者からは、文体や書体、筆跡等が疑わしいことから、偽文書であると鑑定されている。