noun
one's own discretion; one's own idea; one's own responsibility
Used when a decision or action is based on one's own judgment, often in formal or business settings. Common in phrases like 一存では決められない (cannot decide on one's own).
私の一存では決められませんので、上司に相談します。
I cannot decide on my own, so I will consult my boss.
その件は彼の一存で進められた。
That matter was proceeded with at his own discretion.
Compound of 一 (one) and 存 (think, consider). The exact historical derivation is uncertain, but it likely developed as a term for one's own thinking or judgment.