I was actually a good friend of Hiro.M's back when I first joined the tickling community in the early 90s. At that point in time tickling anime was very rare and after discovering that classic japanese tickling art site "Kusuguru No Yakata" and then his own page afterwords, I began corresponding with him regularly about his artwork. I even chatted with him once on the old IRC chat service. Actually that one fanpic he did of Mihoshi having her feet tickled was a request I had made to him.
But one day an e-mail I sent came back to me saying the address was unknown or incorrect. That was the last time I ever heard from him. He was quite a funny individual, even though he spoke very poor english....