I know that some other gardens are ranked as the prettiest in Japan, but this one became my favorite so far. I visited it in spring and fall and I loved how different it looked and felt.
You have a route you can take around the garden, but be prepared: it takes like 60 minuts, because this garden is really big. But for sure I loved to get lost here.
I would recommend to go to the tea house on the big pond, have a green tea before taking a walk around the house itself to discover the beautiful architecture.
This park is perfect to let your soul relax while you can explore Japan.