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.
We accept questions at any time as they arise.
The materials are updated as needed.
Emphasizes continuous availability or constant readiness, often in formal or written contexts. Slightly less common than the 'as needed' sense.
We welcome your visit at any time.
Applications to join this event are being accepted on an ongoing basis.
The latest information will be updated as needed.
Information sessions are held whenever there is demand.
We will respond to customer questions as they come in.
随時 in its 'at any time' sense implies continuous availability similar to 常時, but 常時 more strongly emphasizes an unbroken, constant state rather than on-demand access.
随時 focuses on flexible timing (as needed), while 随意 focuses on free choice or discretion (as one likes), so they overlap but stress different aspects.
随時 means happening as needed without a fixed schedule, whereas 定期的 means happening regularly at set intervals.
随時 means 'at any time, whenever needed,' the opposite of 定時, which specifies a fixed, predetermined time.
随時 means 'as needed' or 'from time to time', the opposite of 常時, which describes something continuous or always available.
随時 describes something done flexibly whenever necessary, while 臨時 describes something temporary or special that departs from the regular schedule for a one-time reason.
随時 means 'at any time, as needed', while 随意 means 'voluntary, at one's discretion'; the two share the kanji 随 and are easily mixed up.
随所 refers to place ('everywhere'), while 随時 (written with the same first kanji) refers to time ('at any time, as needed').
Compound of 随 (following, according to) and 時 (time), literally 'following the time' or 'according to the occasion'. The exact historical derivation is uncertain, but the meaning has been stable in modern Japanese.