From Nobuyuki Sanada's armor to a nicked sword used by the Sanada family's ancestors in the war, there are many valuable items in the museum, but one particularly interesting item is a letter that Nobuyuki sent to a woman in Kyoto. Nobuyuki spills his heart about Matsushiro, a place he would rule over.
In the letter, Nobuyuki writes what a good place Matsushiro is. The curator describes that the letter contains love for Matsushiro and the woman. In the letter, he candidly writes, "You are a kind person, and I am slightly embarrassed to have spilled my feelings," indicating that the two were close.
He sent the letter about two years after the death of his beloved wife. The identity of this mysterious woman in Kyoto is unknown, as is her relationship with Nobuyuki. However, it is obvious that they were close to each other. At the end of the letter, Nobuyuki asks the woman to burn the letter after reading it. Nevertheless, the letter remained intact and ended up exhibited here at the Treasures Museum. Perhaps, the woman cherished it despite Nobuyuki’s desire to have it burnt.