Here's JNTO's guide to classic Japanese gardens. It lists gardens all over Japan. https://www.jnto.go.jp/eng/pdf/special/pg-808.pdf Do you have a Japanese garden that's local to you? Which ones do you recommend for tea, strolling, photography?
Kenroku-en garden in Kanazawa is very famous, unfortunately when I went there last year it was closed due to Covid-19. I was very disappointed. Looks beautiful.