〜次第
as soon as; depends on
Verb ます-stem + 次第 · Noun + 次第だ / 次第で
Sign up free to review this point on a spaced schedule.
次第 has two common uses.
After a ます-stem, it means "as soon as", for something that will happen: 準備ができ次第、出発します, "we'll leave as soon as we're ready". It's formal and very common in business: 結果がわかり次第、ご連絡いたします. Because it's about the future, it can't describe a past event; for that, use たとたん or とすぐ.
After a noun, 次第だ means "depends on": 旅行に行くかどうかは、天気次第だ, "whether we go depends on the weather". 次第で does the same mid-sentence: 努力次第で, "depending on your effort".
The literal meaning is "order, sequence", so both uses are about what follows from what.
Examples
準備ができ次第、出発します。
We'll leave as soon as we're ready.
結果がわかり次第、ご連絡いたします。
We'll contact you as soon as we know the results.
旅行に行くかどうかは、天気次第だ。
Whether we go on the trip depends on the weather.
合格できるかどうかは、あなたの努力次第です。
Whether you pass depends on your effort.
到着し次第、お電話ください。
Please call as soon as you arrive.