If I may take this opportunity......
This tree, if someone would pay attention to the root mass in picture two or three way above, can see a very fiberous root mass. The tree in the basket while showing some larger root are not visable in the bare root structure. Junipers are a species that will allow drastic reduction in root balls and keep on going, allowing them to be easily placed in appropriate shohin containers. The fiberous nature allows reduction with roots dividing from that point easily.
Pines, like in Maria's thread do not take to such drastic measures as reducing roots to fit into small pots. On junipers as long as the canopy is sufficient for health, the tree will respond to root pruning. Pines on the other hand do not respond to this reduction very well. their roots are long and fleshy, with little division. Reducing and or removing can be curtains to a pine while junipers actually love the stress in the small pot thriving on compaction. Junipers tend to be canopy dominate while pines are root dominate.
Nice roots on this one.