Reasons for this were that there were no wars during the Edo period and that most clan families experienced the transfer of landownership, and other than Kokudaka (a system for determining land value for tribute purposes in the Edo period), there was little attachment to the land itself.
江戸時代を通じて戦争がなかったことと、大半の藩主家が領主の交代を経験しており、（石高は別として）土地自体への執着が薄かったことが理由として挙げられる。