Acer tenuifolium 'Kohauchiwa'

Acer tenuifolium 'Kohauchiwa'
Kaede 'Kohauchiwa'

 'Kohauchiwa' is the dwarf form of  'Hauchiwa'.  (when you see the ko- prefix on japanese names, this is often what it refers to, as in ko-murasaki, ko-mayumi, etc.)

Kohauchiwa is a type of vine maple with a small interesting leaf shape

Two pictures from book were taken from Kyuzo Murata's Four Seasons of Bonsai