adverb
as needed; whenever necessary; on demand
Used for actions taken flexibly in response to circumstances, without a fixed schedule. Common in instructions, announcements, and formal contexts.
質問があれば随時受け付けます。
We accept questions at any time as they arise.
資料は随時更新されます。
The materials are updated as needed.
adverb
Emphasizes continuous availability or constant readiness, often in formal or written contexts. Slightly less common than the 'as needed' sense.
当店は随時ご来店をお待ちしております。
We welcome your visit at any time.