Back in 2001, I went on the "Interweb" looking for a tutorial on how to make tilesets for Kyodai Mahjongg. I, like many others, stumbled upon Marc Lesselberg's website & found pretty much everything Kyodai related...the rest is history. (So to speak)
Like John Nicholas, he was a huge fan of the game & probably the BIGGEST supporter of Kyodai as well...NICE GUY too!!
The next site I came across was Mugwump's website...didn't know much about him, but loved his tilesets.
I believe both these guy's sites went offline in 2004...