No, I'm not impersonating Fozzy Bear. Waka is a form of Japanese poetry in a 5-7-5-7-7 meter. More popular is the haiku which is 5-7-5, but I found out about waka through Reiki. During Mikao Usui's lifetime the Meiji Emperor ruled over Japan and was also a notable waka poet. Usui sensei used the Meiji Emperor's poems as a part of his Reiki Association meetings. Some of them have been translated and you can find them in the appendix of the book The Spirit of Reiki (Lubeck, Petter, Rand).

Here are a few examples: