As each day passes I'm getting more interested in species maples and your photo Keith has made the day I purchase more of these a step closer. Great photo.
I had taken some pictures of this, thanks for reminding me to post. The title of the thread should probably be changed to Acer sieboldianum Miquel (1865), TIA if any moderators are paying attention. It is quite difficult to differentiate this species from pseudosieboldianum, and the two are often confused, as it can be quite polymorphic (as the whole Section.) IIRC the number of bud scale scars below new growth is determinant. On this windy day it was very difficult to get focus, so I didn't try (much) to show bud scales scarring or hairy petioles, just some leaves, flowers and a few different views, the first from inside. It is a magnificent tree all year, with great autumn colors and fine winter form, but like many it suffered very much over the last couple of years. Reputedly it's a very tough maple, I certainly hope so.