The reason for this was to fulfill the wish of Masakage YAMAGATA, former head of the Akazonae, and also because red stands out, making it easy for him to know his soldiers location at a glance during battle.
これはかつて赤備えの将であった山県昌景の意志を継ぐという意味もあったが、その他に赤色だと目立ちやすく、戦の最中にどこに自分の部下達がいるのかが一目で分かるという意味もあった。