My today's recommendation is Kawazu city.
Kawazu cherry blossoms are early-blooming cherry blossoms that begin to bloom from mid-February to early March every year in Kawazu city of Shizuoka Prefecture. During that period a several hundred cherry trees blooms along the both side of river. Unlike the normal cherry blossom this kawazu cherry blossoms are bright colors. In a short distance one can also see the mountains on one side and sea on the other side. The river water is crystal clear. Most importantly, the local peoples are very tourist friendly.