There is no description of the reason in the family tree, but two years later the UTSUNOMIYA clan, a head family, was also ordered 'kaieki', which suggests they were involved in political strife in the TOYOTOMI administration, but this isn't clear.
系譜に理由の記載は無いが、この2年後に本家である宇都宮氏も改易された事実とあわせて考えると、豊臣政権内の政争に巻き込まれたものと考えられているが定かではない。