From Ground: Thoroughly water the japanese prickly ash plant's soil the day before the move to dampen the soil. Then, dig around the plant with a shovel or spade, making sure to dig deep enough to keep the plant's root ball intact. Carefully work the spade underneath the root ball to lift the plant up and out of its original location.
From Pot: If japanese prickly ash is in a pot, start by gently tipping the pot onto its side. Gently ease the plant out while being careful not to force it. If the plant is resistant, you can tap the bottom of the pot or use a knife to carefully loosen the edges before attempting to remove the plant again.
From Seedling Tray: To remove japanese prickly ash from a seedling tray, carefully hold the stem close to the base of the roots. Gently lift it, allowing it to slide out. If it's stubborn, you can push up on the bottom of the tray or use a spoon to encourage it out of the cell.