Under the condition that ever green maples are not popular in Japan
but popular in China and Southeast Asia,
we can see this flying moss maple only in Okinawa Pref.
It does not look like what we call Japanese maples by its appearance.

Flying moss tree (Acer oblongum, Acer albopurpurascens) in Taipei

Let me show you germination of cutting trees, flowers & seeds at my house.

Upper left : sprouting of flowers & leaves, Right : Flowers magnified
Lower left : Flowers more magnified, Right : Form of seed (surprised)