You forgot, having a close relative with a stake in the outcome of the decision.
maybe you should read the rules before denying their existence.
ママ活アプリ・サイトのおすすめランキングや選び方、安全に使うための注意点を詳しく解説。顔合わせやデートごとのお手当相場、プロフィール作成のコツも紹介し、初心者でも安心してママ活を始められる情報をまとめています。
lawcirca.com
A judge in order to maintain fairness and impartiality in his duty to perform an action should recuse himself in the following situations:
•When the judge is interested in the subject matter or he has a relationship with someone who has an interest in it.
•When the background or he has some experience in relation to the matter at hand as a lawyer. ...
•When he has personal knowledge about the parties or the case before him
•When there is ex parte communication with the parties or lawyers.