Sakuramochi(桜餅?) is a Japanese sweet consisting of sweet pink-colored rice cake (mochi) with a red bean paste (anko) center, and wrapped in a pickled cherry blossom (sakura) leaf. Different regions of Japan have different styles of sakuramochi. Kanto-style uses shiratama-ko(白玉粉?, rice flour) to make the rice cake, and Kansai-style uses dōmyōji-ko(道明寺粉?, glutinous rice flour). The sweet is traditionally eaten during the spring season, and especially on Girl's Day (hinamatsuri) and at flower viewing parties (hanami).
The interior of a sakuramochi, showing the red-bean paste inside.
You do not eat the leaf, you smell it and it is there for aroma. Consuming the Japanese oak leaf may lead to an upset stomach.