While remaining to have no male heir after succeeding the position of the lord of the domain, Tadatomo began to have hatred against pregnant women in the domain and caused appalling tragedies, repeatedly killing fetuses and mothers by cutting open mother's abdomen.
忠知が藩主の座を継いで以降世継ぎの男子が生まれないまま時を重ねていたが、やがて藩内の妊婦に憎悪を向けることとなり妊婦を捕まえては腹を割き母子共々殺害するという惨劇を繰り返していたという。