The artist who drew Kanon used different sites in Japan for inspiration. Here are a couple of examples. In the Links section is a link to Punyari's Island Adventures which has about 20 photos of real places in Japan that ended up in Kanon.
photo
kanon
real kanon places
shiori
yuichi
great anime
anime drama
nayuki
This Kanon photo contains
patio, terrace, front porch, resort, resort hotel, and holiday resort.
There might also be
bungalow, cottage, resort hotel, spa, and ranch house.