Susono is the mountainfoot of Mt. Fuji so there are lots of nice Mt. Fuji viewing spots. Particularly some of the places listed are popular.

Mt. Fuji from Mizugatsuka Park: From up-close Mt. Fuji looks much different from what you have seen from distant places.
Mt. Fuji from Jurigi Kogen Tenbodai: You don't have to climb far up to Mt. Echizen to see a great view of Mt. Fuji. It's only short climb from Parking Space for Mt.Echizen.
Mt.Fuji from Mt. Echizen: Mt.Echizen about 2 hours climb from Jurigi Highlands is also a popular Mt. Fuji viewing spot.