However, it is unlikely that Nobutaka, a polished busho, would have written such a poor and obvious death haiku, and there is doubt as to whether the poem is actually his.
しかしたしなみある武将の信孝が、このような稚拙で露骨な辞世の句を残したとは考えにくく、この辞世の句が信孝の残したものかどうかは疑問である。