How to say "assign" in Japanese

Choosing the right word
  • 割り当てるわりあてるCommon
    ichidan verb, transitive verbCovers assigning or allotting something to people, such as tasks, seats, or resources, with a nuance of dividing things up among recipients. A typical choice for 'each member was assigned a role'.
    私に新あたらしい部屋へやが割り当わりあてられた。↗
    A new room was assigned to me.
  • 割り振るわりふるCommon
    godan verb, transitive verbVery close to 割り当てる: assigning or distributing tasks or shares among a group, often in the context of dividing work up. Both are natural for 'assign tasks to each person'.
    登場とうじょう人物じんぶつがうまく割り振わりふられていた。↗
    The characters were well cast.
  • 課するかするCommon
    suru verb (irregular), transitive verbFormal, written-style word for imposing something on someone: a tax, fine, burden, or a task or duty. For 'assign' it suits official contexts like duties imposed on an employee; not for casually handing out small tasks.
    This school sets high moral standards for pupils.
  • 充てるあてるCommon
    ichidan verb, transitive verbAssigns something to a particular use or person in the sense of setting it aside or allocating it, e.g. money or staff assigned to a project. Emphasizes designating something for a purpose rather than dividing it among people.
    彼かれはその金かねを借金しゃっきんの返済へんさいに充あてた。↗
    He applied the money to the payment of debts.
  • 課すかすCommon
    godan verb, transitive verbSame meaning as 課する: to levy taxes or fines, or to impose tasks and duties on someone. Only use it for that imposing sense of 'assign'; it is not the word for assigning ordinary work items to colleagues.
    A new tax was imposed on wine.

Use 「割り当てる」 or 「割り振る」 for distributing tasks or resources among people, 「充てる」 for setting something aside for a purpose, and 「課する」/「課す」 for formally imposing duties, tasks, taxes or fines.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

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