Military service book

Japanese: 軍役帳 - ぐんやくちょう

A ledger prepared by a sengoku or early modern daimyo to allocate the type and amount of military service to each of his vassals. It is also simply called a service ledger. Among the sengoku daimyo, the Odawara Hojo clan's Odawara Shushoryo Yakucho (1559) is well known, and based on the registered kokudaka (rice field amount), taking into account yearly changes, it determined the guns, bows, spears, and flags that each vassal should carry when going into battle, as well as the number of combatants to operate them. In the early modern period, the military service of vassals was determined based on the kokudaka (rice field amount), but just as in the Sengoku period, a ledger was required that calculated and allocated the number of weapons and attendants according to the stipend.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

戦国大名または近世大名が，家臣の1人ごとにその提供すべき軍役の内容と量を割り当てるために作成した帳面。単に役帳ともいう。戦国大名のものでは，小田原北条氏の《小田原衆所領役帳》(1559)が著名であり，これに登録された貫高を基準に年々の異動が加味されて，個々の家臣が出陣に際して携行すべき鉄砲･弓･鎗･旗と，これらを操作する戦闘員の数が定められた。近世では，家臣の軍役は石高を基準に決定されたが，それには知行高に応じて武器と従者の数を計算して割り当てた帳面が必要であったことは，戦国期と同様であった。

出典　株式会社平凡社世界大百科事典第２版について　情報

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