take it upon oneself

Verb

idiomatic

(idiomatic) To assume personal responsibility for a task or action.

Japanese Meaning

自分自身に責任を負って、ある行動や任務を遂行すること / 自ら進んで職務や課題を引き受けること

When the committee couldn't agree, someone chose to take it upon oneself to make the final decision.

委員会が合意に達しなかったとき、誰かが最終決定を下すことを自ら引き受けた。

Sense（1）

(idiomatic) To assume personal responsibility for a task or action.

She took it upon herself to manage the project.

takes it upon oneself

（ present singular third-person ）

taking it upon oneself

（ participle present ）

took it upon oneself

（ past ）

taken it upon oneself

（ participle past ）