Grammar
N2 connective

Now that / given that 〜からには

Meaning

"Now that ~", "given that ~" — a premise the speaker then acts on.

Formation

Notes

The second clause must be a resolution, an obligation or advice — 〜つもりだ, 〜なければならない, 〜べきだ, 〜たい — never a neutral fact. 〜以上(は) is its interchangeable, slightly more formal twin.

Examples

Now that I have promised, I will certainly keep my word.

Breakdown
promised now that without fail will keep

Having taken it on, I will see it through to the end.

Breakdown
took on now that to the end will do

If I am going to play in the match, I want to win.

Breakdown
match take part now that / if want to win

If you are going to live in Japan, you ought to learn Japanese.

Breakdown
Japan live given that Japanese language ought to learn

As long as you are a student, study comes first. (noun + である)

Breakdown
student given that one is study comes first

⚠️ Often confused with

Precisely because 〜だけに

"Precisely because ~", "all the more so because ~".

Knowing them 〜ことだから

"Since it is ~ (that person), …" — a prediction based on someone's known character.

It is precisely because 〜からこそ

"It is precisely because ~ that …" — emphatic reason.