Most of the anime has sakura scene especially set in Japan like Love Hina, boys Be, Card Captor Sakura, inuyasha, Sakura wars, TRC...etc. Its easier to find picture if its a calendar. March or April are usually designed with sakura background
If i remember correctly, the first scene in sakura war was sakura rushed to watch blooming sakura tree. The ending song of the episode was sakura sitting in her kobu with sakura tree background.
ccs has lot of sakura tree too. The opening theme "catch you catch" has sakura petals scene.
Boys Be- this series has strong emphasis on "season" therefore has lot of sakura scene.
Music? there are lots of music dedicated to sakura. but I suggest "Boys Be" music. It bgm has seasonal theme.