What's in a name?
Cool that you can get these in the states Jane. It is not rare here in Japan, but not common either, and still a little pricey. Like many plants sold under a Japanese name (in this case sekkoku or chouseiran) it is in fact not a pure species form, but a hybrid. In this case a cross between Dendrobium Ise (D. moniliforme x D. stricklandianum)and a yellow flowered form of D. moniliforme (kibana-no-sekkoku). Naming in Japan can be maddening if you don't know what goes into a plant, and sometimes this is held as secret. In this case 三冠王 (sankanou)means "Triple Crown", but unless you know, it is simply another form of D. moniliforme (sekkoku).
Regardless, it is lovely little plant and fairly cold hardy.