Koyasan
There is a way that you can walk at least part of the way from Wakayama to Koyasan. It is via the Koyasan’s Choishi Stupa Route. However we finished the Kumano Kodo exhausted and wet, not feeling much like another day’s climb so we took the train instead. The train runs up a pretty valley and then a cable car takes you to Koyasan. Here’s a slide show Koyasan (pictures only)
(For more information and maps of Koyasan :Â http://www.shukubo.jp/eng/)