How long does ISI take to notify agencies like Go! Go! Nihon about application acceptance?

Hey everyone! I applied to ISI Language School (Takadanobaba) for the October 2026 intake through Go! Go! Nihon. May 18th was the application deadline I was given, so it's been about a week since then and I'm currently in that waiting pool.

I was wondering for anyone who's gone through this process, how long does it typically take for ISI to get back to agencies like Go! Go! Nihon with a decision on whether an applicant was accepted or not? Is a week normal, or should I expect to wait longer?

Any insight from people who've been through this would be super appreciated!