Acer palmatum 'Sango Kaku'

Acer palmatum 'Sango Kaku'
Japanese Maple 'Sango Kaku'

CUTTING GROWN, of course!

Can come wired or not, either way it should not matter (see below)

Please see attached image from Meriggioli's book Bonsai Maples.  The core principle being illustrated -- thicken a section, cutback to a new leader, thicken next section -- can be used to grow any style of bonsai: upright, slant, cascade, etc.