N2 — outside your level filter
次第
しだいshidaiN2neutral
Same meaning4
the moment X happens; as soon as
- か〜ないかのうちにno sooner does one X than — the first isn't even done yetattaches at
- かと思うとjust when it looked like X — the opposite happens right awayattaches at
- た途端にthe moment; no sooner had — an abrupt, usually surprising, consequenceattaches at
- と同時にat the same time as; the instant that — or, while also beingattaches at
All examples3
as soon as; the moment X is done — a non-past planned act
詳しいことが分かり次第、ご連絡いたします。
kuwashii koto ga wakari shidai, go renraku itashimasu.
As soon as we learn more details, we will get in touch. formal
荷物が届き次第、連絡します。
nimotsu ga todoki shidai, renraku shimasu.
As soon as the package arrives, I'll get in touch. neutral
「準備でき次第呼んで！」
junbi deki shidai yonde!
Call me the moment you're ready! casual
How it's formed1
Notes
What follows 次第 must be a non-past planned act, not a surprise (荷物が届き次第…). The first event can happen to anyone, planned or not.