Flowering cherry and Japanese cherry

Flowering cherry noun - Any of several shrubs or trees of the genus Prunus cultivated for their showy white or pink single or double blossoms.

Japanese cherry and flowering cherry are semantically related. In some cases you can replace phrase "Japanese cherry" with "Flowering cherry", this phrases are similar.

Japanese cherry noun - Ornamental tree with inedible fruits widely cultivated in many varieties for its white blossoms.

Flowering cherry and Japanese cherry are semantically related. You can use "Flowering cherry" instead a noun phrase "Japanese cherry".