In the tumultuous years of the Muromachi period and the Sengoku period (period of warring states) (Japan), there was a tremendous increase in agricultural production, but because all Japan had become a jigsaw puzzle made up of nodes of local authority who went through an endless cycle of prosperity and decline, and because the period also saw many feudal lords begin to declare their independence, it became extremely difficult to keep track of the true total agricultural productivity even on the land within one's own jurisdiction.
室町・戦国時代(日本)の混乱時代、農業生産高は爆発的に増加したが、各地にモザイクのように存在する割拠勢力はそれぞれ消長を繰り返し、また支配下にも多くの自立領主がいるため、自領の実質総農業生産高を把握するのも困難であった。