There is a theory that Hidenobu and Nobunaga were seemingly alike and it is said that Hidenobu wore armor which was similar to Nobunaga's and came out into the field during the prelude of the Battle of Sekigahara.
信長に容貌が酷似していたとする説もあり、関ヶ原の前哨戦で戦ったときには、信長を髣髴とさせるかぶいた甲冑をまとって出陣したと伝わる。