Explanation
Used to express the reason or premise for a decision or judgment; 'since', 'because'.
Formation
Verb (plain form) + こととて / Noun + の + こととて / (な-Adjective + な) + こととて
Detailed explanation
The ～こととて grammar point expresses a reason or premise in a slightly formal or literary way. It can often be interpreted as 'since' or 'because'.
Examples
Kare wa saiban ni katsu tame ni zenshisan o tsukau koto tote, bengoshi ni tanonda.
Since he's using all his assets to win the trial, he hired a lawyer.
Ashita wa taisetsu na shiken ga aru koto tote, konya wa hayaku nemasu.
Since I have an important exam tomorrow, I’m going to bed early tonight.
Kono purojekuto no seikou wa kaisha no mirai ni eikyou suru koto tote, zenryoku o tsukushimasu.
Because the success of this project will affect the company's future, I will do my best.
Kare ga yuumeijin de aru koto tote, puraibashii ga hogo sareru beki da.
Since he is a celebrity, his privacy should be protected.
Practice
Grammar content sourced from hanabira.org.