Number banner - Number banner

Japanese: 数幟 - かずのぼり

…Usually two pieces of cloth are sewn together to the bottom. In military camps, they are fixed to flag posts (frames, flag fences) and called kazu nobori (number of flags). Many identical flags are erected in a hook shape so that they can be seen from all sides, as a show of force. When moving a flag, it is pulled by ropes by foot soldiers and several nakama. …

From [Flags]

…Flags that were associated with good fortune in particular were considered sacred and treasured by families. Flags such as the numbered flags used to boost morale and intimidate the enemy were required to be new and full of vitality, since old and worn-out flags could affect morale. When a new squadron was formed, new flags were also required. …

*Some of the terminology explanations that refer to "kazunobori" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…普通二布を下部まで縫合する。軍陣には幟杭（くい）(枠，旗籬（はたかき）)に固定し，数幟（かずのぼり）と呼び，同一のものを数多く，諸方より見えるよう，鍵形に立てて威勢を示す。幟を移動させるときは足軽･中間数人によって綱で引く。…