Not to mention the larger gardens of nunneries and other religious sites... I think too often westerners (if I may paint with broad sweeps and generalizations) perceive the quintessential Japanese garden as either a tiny tsuboniwa (courtyard garden, a small to medium sized squarish open space that is an architectural element of 99% of all traditional Japanese homes) or an austere dry raked bed of gravel with a few boulders here or there.
Dave