Item: 893-209 - Japanese Brass Ikebana Kenzan Sun/moon #2br From Hollow Creek Bonsai Item: 893-209 - Japanese Brass Ikebana Kenzan Sun/Moon #2BR From www.hollowcreekbonsai.com . Known by many different names Pin Frog, Flower Frog, Flower Spikes, Needle Holder and Kenzan it is a must for flower arranging enthusiasts. Flower frogs are reusable pieces of lead with small spikes that hold flowers in place within the arrangement.