MK and Ippodo Restocks - when is it usually?

Hi!

I was able to grab Ikuyo for the first time with Ippodo restock just happened an hour ago and so excited!
I saw their restock last week but even before checking out they were all sold out 😭

Anyways.. I've been curious when do they (MK and Ippodo) restock usually? Is the restock happens at random times? Is there like a restock notification or something?

I was told Ippodo restocks around 5AM PST so never thought to look into the website.

I really want to catch MK restock as well but every time I check on the website it's all sold out.