on the occasion of; at the time of; when
A formal expression used for an action or situation connected with a particular event, occasion, or important step. It commonly follows nouns, as in ご利用に際して, or dictionary-form verbs, as in 契約を結ぶに際して.
When using the service, please read the terms of use.
契約を結ぶに際して、いくつか確認したい点があります。
When entering into the contract, there are a few points I would like to confirm.
際に is a lighter, more common way to say 'when/on the occasion of,' while に際して is a heavier, more formal fixed expression typical of notices and business writing.
ときに is a neutral, everyday way to say 'when,' whereas に際して carries a formal tone and specifically highlights an important occasion or step.
に際して emphasizes the special or significant nature of an occasion, while にあたり is more neutral and can also apply to routine events.
に際して highlights a specific occasion or event ('on the occasion of'), whereas にあっては focuses on the broader situation or condition someone is in.
に際して is a slightly more formal equivalent used especially for special or notable occasions, while にあたっては fits everyday formal writing and instructions as well.
A fixed expression built from に plus the te-form of 際する, related to 際 meaning an occasion, time, or juncture.