Is the fruit of Japanese Blueberry Tree all right to eat?

The term "Japanese Blueberry Tree" is a bit misleading. It's not a true blueberry tree. There are two possible plants you might be referring to:

* Japanese Blueberry (Vaccinium japonicum): This is a true blueberry species, native to Japan. Its fruits are edible, though they are small and tart, not as sweet as cultivated blueberries.

* Japanese Enkianthus (Enkianthus perulatus): This is a completely different plant, often called a "Japanese Blueberry Tree" due to its similar appearance to blueberries. The fruits of this plant are NOT edible and can be mildly toxic.

To be safe, it's important to identify the specific plant you're looking at. If you're unsure, it's best to err on the side of caution and not consume the fruit.

Here are some tips to help you identify the correct plant:

* Leaves: Japanese blueberries have oval-shaped leaves with finely toothed edges, while Japanese Enkianthus leaves are more oblong with finely serrated edges.

* Flowers: Japanese blueberries have small, bell-shaped flowers, while Japanese Enkianthus flowers are bell-shaped but more showy and often brightly colored.

* Fruit: Japanese blueberries have small, round, blue fruits, while Japanese Enkianthus fruits are small, round, and reddish-brown.

If you're still unsure, you can consult a local plant expert or a gardening website for a more accurate identification.