This was because, through the Dappan samurai, the Domain's military secrecy and family troubles could be revealed in public and frequently caused fatal 'Kaieki' sanctions (sudden dismissal and deprivation of position, privileges and properties) for the domain (and/or the lord of the domain).
これは、脱藩者を通じて軍事機密や御家騒動などが表沙汰になり、藩（藩主）にとっては致命的な改易が頻繁に生じたことも一因である。