からこそ
(Kara koso)
precisely because / it is exactly because.
Connection rules
- +V plain / i-adj + からこそ; na-adj / noun + だ + からこそ.
- +Common variant of 〜ばこそ — より neutral register.
- +Emphasizes that X is the essential reason, ruling out other potential causes.
Examples
1.
大切な友達だからこそ、厳しいことも言う。

Taisetsu na tomodachi da kara koso, kibishii koto mo iu.
It's precisely because you're a dear friend that I say harsh things too.
「precisely because / it is exactly because」
2.
難しいからこそ、挑戦する価値がある。

Muzukashii kara koso, chousen suru kachi ga aru.
Precisely because it's difficult, it's worth the challenge.
「precisely because / it is exactly because」
Practice
It's precisely because I like Japanese that I can keep studying every day.
日本語が___、毎日勉強を続けられるのです。
Romaji also accepted