Kasahara wrote Yamanaka as a patriotic man who was too young to have fought in the war .
Yamanaka devoted Yamanaka 's loyalty Yamanaka 's his yakuza boss and killed with a gun instead of a fighter jet .
Kasahara wrote Yamanaka as a patriotic man who was too young to have fought in the war , so he devoted his loyalty to his yakuza boss and killed with a gun instead of a fighter jet .