I have a similar trick where a magician hides rather than a rabbit. He has a magnet in his hat and you hide a secret something in your hand. This version looks a lot cleaner but I dont own it either. Annoyingly they had one in Davenports for years and I never grabbed it. D'OH!
The gimmick is fabulous: it is simple, almost undetectable and is removed before inspection.
However, the gimmik can break and Tenyo predicts it (even if it did not happen to me).
One of the best
@VictorS : Ask JohnM , we see two Lucky Rabbits on the photo
This trick appears in many many tens of thousands of magic sets sold since the turn of the 19th century. They used a horse hair.
What Shimomura did that is ingenious (in addition to creating more interesting props) is create a way to allow the nylon strand to emerge and retract, and lock. Sugawara might have developed the locking system if he was still working at Tenyo when this came out. I really can't remember offhand.
Great trick. There's one on eBay right now, no box, for a reasonable starting bid.