u/Complex_Contact_8490

Japanese passport holder here and I have a question regarding visas.

My German WHV expires in mid-July and when it does, I'm planning to visit the UK for a month, then re-enter the Schengen zone through the Netherlands, and stay in the Schengen zone for 90 days before going back to Japan. (Basically, I want to stay in the EU for as long as I can before going back home.)

Is this possible, or will I need to be out of the Schengen zone for 90 days before re-entering? Anything else I should be aware of? Thank you in advance!