Translation guide
The English verb "apportion" means to divide and distribute something (such as money, resources, blame, or time) among several people or groups, often according to a plan or in a fair way. In Japanese, there is no single direct equivalent; the best choice depends on what is being divided and the context.
To divide and allocate funds, expenses, or resources among parties.
The most common and versatile verb for allocating or assigning a share of something to someone. Works for budgets, tasks, time, etc.
予算を各部署に割り当てる。
Apportion the budget to each department.
Emphasizes distribution according to a plan or ratio. Often used for resources, time, or work.
利益を株主に配分する。
Apportion profits to shareholders.
A formal, technical term for proportional division, often used in accounting or legal contexts.
費用を収入に応じて按分する。
Apportion expenses according to income.
To assign portions of fault or duty to different people or groups.
Literally 'to make someone bear responsibility'. Natural when apportioning blame or responsibility.
事故の責任を関係者に負わせる。
Apportion blame for the accident to those involved.
Means 'to share responsibility'. Suitable when the focus is on dividing duties rather than assigning fault.
プロジェクトの責任をチームで分担する。
Apportion responsibility for the project among the team.
To divide one's time or energy among different activities.
Literally 'to split time'. A natural way to say you apportion time to something.
勉強と仕事に時間を割く。
Apportion time between study and work.
More formal, emphasizes planned distribution of time.
各科目に勉強時間を配分する。
Apportion study time to each subject.
There is no single Japanese verb that covers all uses of 'apportion'. Using a dictionary equivalent like 割り当てる in every context can sound unnatural. Choose the expression based on what is being divided.